Mansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201The Effect of Gamma-Rays on Cotton Yield, Yield Components and Fiber Quality Characters127712844198110.21608/jpp.2017.41981ENM. H.OrabiCotton Research Institute, Agricultural Research Center, Giza, Egypt.H. A.El-HoseinyCotton Research Institute, Agricultural Research Center, Giza, Egypt.Y. Sh.Abd-El-RahmanCotton Research Institute, Agricultural Research Center, Giza, Egypt.M. S.KhaterNational Institute of Laser Enhanced Science (NILES) Cairo University, Egypt.Journal Article20190724The present research was carried out to study the effect of using gamma rays dose 10 and 15Kr on the yield and yield components and quality traits in M<sub>1</sub>, M<sub>2</sub> and M<sub>3</sub> generations during 2014, 2015 and 2016 seasons for two cultivars Giza 92 and Giza 94. The results showed that the effects of treatment were significant for all studied traits except Micronaire reading in M<sub>1</sub> and fiber length in M<sub>1</sub> and M<sub>2</sub>. Also the results revealed that the interaction between the cultivars and doses were significant for all traits except for boll weight in M <sub>3</sub>, lint percentage and fiber length in M<sub>2</sub>. The effect of dose 15 Kr had significant effects for seed and lint cotton yield. The variability in M<sub>1</sub> and M<sub>3</sub> were higher than the variability in M<sub>2</sub> due to effectiveness of sever selection in M<sub>1</sub> generation. Positive coefficient skewness were found for seed cotton yield, lint yield, number of bolls and lint percentage indicating that most of plants lie left half of curve. While, most of plants lie in right half of curve for boll weight, Micronaire reading and pressely index in M<sub>1</sub>. Moment coefficient of kurtosis were less than 3 for all traits in M<sub>1</sub>, M<sub>2</sub>, and M<sub>3 </sub>it can be concluded that the normally curves of plant distribution were platykurtic so the variabilities were broad. https://jpp.journals.ekb.eg/article_41981_ad339c2c85197547b1a9ef574b1dc1fe.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Effect of some Bio-stimulants on Growth, Yield and Bulb Quality of Garlic Grown in Newly Reclaimed Soil, New Valley-Egypt128512944198210.21608/jpp.2017.41982ENM. A. M.AliHort. Dept., Fac. Agric., Assiut Univ. (New Valley Branch), Egypt.Journal Article20190724This work was performed during the two consecutive winter seasons of 2015/2016 and 2016/2017 at the Farm of the Faculty of Agriculture, Assiut University (New Valley Branch), to investigate the effect of foliar spray with bio-stimulant namely yeast extract (0, 1, 2 and 3 %), and two antioxidants; i.e., salicylic acid and ascorbic acid at 200 ppm of each, beside control treatment on plant growth, yield and its components as well as bulb quality of garlic cv. Sids-40 under newly reclaimed soil of New Valley-Egypt. Results showed that the interaction between foliar spray with yeast extract at 3 % and sprayed plants with salicylic acid at 200 ppm was the best interaction treatment for increasing plant growth traits, i.e., plant height, leaf area/plant both fresh and dry weight/plant, bulbing ratio, mineral contents (N, P, K and S in leaves and bulb) and biochemical concentration in leaves (total carbohydrates and salicylic acid) after 135 days from planting time, total yield/fed. and bulb parameters as well as bulb quality (total carbohydrates and salicylic acid contents) at harvesting time, while the interaction between yeast extract at 3 % and sprayed plants with ascorbic acid at 200 ppm gave the highest values of ascorbic acid content in leaves and bulb at 135 days after planting and harvesting time respectively in both seasons. The increases in total yield were about 166.9 and 165.1 % for the interaction treatment between the plants which sprayed with yeast extract at 3 % and salicylic acid at 200 ppm; 148.9 and 151.3 % for the interaction treatment between the same rate of yeast extract and sprayed plants with ascorbic acid at 200 ppm over control treatment in the 1<sup>st</sup> and 2<sup>nd</sup> seasons, respectively.https://jpp.journals.ekb.eg/article_41982_c986404e6fe67359c33ac9bbdb1f589a.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Response of Sugar Beet Yield and Water Use Efficiency to Deficit Irrigation and Weed Competition under Drip Irrigation System129513024198310.21608/jpp.2017.41983ENKh. A.Abou-ZiedWeed Research Central Laboratory, Agricultural Research Center, Giza, Egypt.A. E. A.Abd El-AllSoil & Water and Environment Research Institute, Agricultural Research Center, Giza, EgyptA. M.OsmanSoil & Water and Environment Research Institute, Agricultural Research Center, Giza, EgyptJournal Article20190724Under drip irrigation condition, two field experiments of sugar beet (<em>Beta vulgaris</em> L.) were conducted, in sandy soil, at El-Bostan area, Aly Mubarak Experimental Farm, Southern El-Tahrir Region, El-Buhira Governorate, Egypt, during 2013/14 and 2014/15 winter seasons, to evaluate the impact of water deficit irrigation and its relation with the critical period of weeds infestation on sugar beet yield, quality and water use efficiency. The experimental design was a split-plot design, where three water irrigation regimes treatments, i.e. 60, 80 and 100 % of evapotranspiration (ET<sub>0</sub>), were allocated in the main plots, and the ten weed removal intervals were allocated in the sub-plots which included five weed free for 3, 6, 9, 12 weeks after planting (WAP) and weed free the whole season, and five weed infestation for 3, 6, 9, 12 (WAP) and weed infestation for the whole season. The main findings indicated that the highest significant reduction on the fresh weights of grassy, broad-leaved and total weeds was obtained by irrigation at 60 % ET<sub>0</sub> by14.8, 16.0 and 15.6 %, respectively, in 2013/14 season and 25.0, 13.6 and 17.3 %, respectively, in 2014/15 season, as compared to 100 % ET<sub>0</sub>, which reflected in increases on root and gross sugar yield per faddan by 58.8 and 60.2 %, respectively, in 2013/14 season and 65.5 and 40.1 %, respectively, in 2014/15 season, as compared to irrigation at 100 % ET<sub>0</sub>. Furthermore, water use efficiency of irrigation at 60% ET<sub>0</sub> gave the highest values of root and sugar yield by 7.2 and 1.2 kg/m<sup>3</sup>, respectively, in the first season and 7.1 and 1.3 kg/m<sup>3</sup>, respectively, in second season. The dominant annual weeds were the broadleaf weeds with infestation rates 3.0 kg and 3.5 kg fresh weight /m<sup>2</sup> in the first and second seasons, respectively. Whilst, the infestation rate of the grassy weeds was 1.3 kg and 1.4 kg fresh weight/m<sup>2</sup> in the both seasons, respectively. In the both seasons, the highest reduction on the fresh weight of the two weeds categories and their total was obtained from all weed free and weed infestation treatments (> 90 %) as compared to weed infestation for the whole season, except with weed free for 3 weeks (< 70%). These results reflected on sugar beet yields (ton/fed). In the first season, the significant increasing on dry weight of tops, roots and the gross sugar yield (ton/fed) was between 118.6, 302.5 and 353.8 %, respectively, in weed free for the whole season to 58.5 % for tops by weed free for 3 weeks, 135.2 % for roots by weed free for 6 weeks and 50.0 % for gross sugar yield by weed infestation for 9 weeks, as compared to weed infestation for the whole season. In second season, the significant increasing on dry weight of the tops, roots and gross sugar yield (ton/fed) was between 98.8, 311.3 and 288.7 %, respectively, in weed free for the whole season to 37.5 % for the tops and 35.0 % for the roots in weed free for 3 weeks and 106.5 % in weed infestation for 6 weeks, as compared to weed infestation for the whole season. While, the rest weed free and weed infestation treatments in the both seasons didn't reach to significant increasing values. For sugar beet quality i.e. TSS, sucrose and purity %, all weed free and weed infestation treatments gave the same values approximately in deferent intervals. Also, different weed removal intervals can raise water efficiency by 240-320 % compared to leave the weeds to compete sugar beet plants for whole season. Concerning the interaction effects, the data indicated that the great reduction on the fresh weight of the two weed categories and their total was obtained from irrigation at 60 % ET<sub>0</sub> with weed free for whole season, weed competition for 3 WAP and weed free for 12 WAP, in both seasons. Also, the interactions between both 60 and 80% ET<sub>0</sub> irrigation regimes with both weed free for 12 weeks and the whole season gave the highest increasing on the roots and gross sugar yields (ton/fed) in the both seasons. The findings also revealed that the critical period of weed interference between 3 and 12 weeks after planting and the yield losses in this period. Thus, we can conclude that to save water irrigation and maximize root and sugar yields of sugar beet (ton/fed) must be irrigate at 60% ET<sub>0</sub> with controlling weeds until 12 week from planting.https://jpp.journals.ekb.eg/article_41983_701c889f7a7b761ca99707920d983353.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201The Mutual Effect of Irrigation Scheduling and Foliar Spray of Silica Nanoparticles on Basil Plant130313134198410.21608/jpp.2017.41984ENM. A.MahmoudWater Requirements and Field Irrigation Department, Soils, Water and Environment Research Institute. Agricultural Research Center, Giza, Egypt.A. Y.ShalaMedicinal and Aromatic Plants Research Department, Horticulture Research Institute. Agricultural Research Center, Giza, Egypt.Nahed RashedVegetable and Ornamental Department, Faculty of Agriculture. Damietta University, Damietta, Egypthttps://orcid.org/myJournal Article20190724Afield experiment was conducted during 2016 and 2017 in the Research Farm of Sakha Agricultural Research Station, Kafr El-Sheikh Governorate, Egypt to evaluate the mutual effect of irrigation scheduling and silica nanoparticles on <em>Ocimum basilicum</em> L. vegetative growth, yield, chemical composition and some water relations. Irrigation scheduling treatments were 1.2, 1.0 and 0.8 of cumulative pan evaporation (CPE) while a foliar spray of silica nanoparticles at 30, 60, 90 ppm and distilled water as a control. Results showed that 0.8 of CPE decreased vegetative growth characters, fresh and oil yield ha<sup>-1</sup> and transpiration rate nevertheless, increased chlorophyll content, oil% and stomatal resistance value in the two cuts of both seasons. Silica nanoparticles at 60 and 90 ppm increased all characters likely oil yield increased by 52.2% over the control. Irrigation at 1.0 of CPE with silica nanoparticles at 60 ppm recorded the highest values of vegetative growth, fresh and oil yield, chlorophyll content and oil%. The highest essential oil components were α –terpineol and linalool in plants sprayed with 60 and 90 ppm silica nanoparticles under all irrigation treatments. The greatest values of seasonal consumptive use and applied irrigation water were observed from plants treated with 1.2 of CPE while, the lowest values obtained from 0.8 of CPE. The highest values of productivity of irrigation water and water productivity were recorded after 1.0 of CPE. Finally, plants treated with 1.0 of CPE combined with silica nanoparticles at 60 ppm showed enhanced vegetative growth, fresh and oil yield, stomatal resistance value, oil components while, decreased transpiration rate. Furthermore, decreased water consumptive use 7% and applied irrigation water 5% while, increased water productivity by 24% and productivity of irrigation water by 20 % compared to 1.2 of CPE without silica nanoparticles spray.https://jpp.journals.ekb.eg/article_41984_fb5676b4ae781a7d7e766b7659438f92.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201An Attempt to Alleviation of Irrigation Water Deficit Stress in Cabbage (Brassica oleracea Var. Capitata L.) by Exogenous Foliar Application with some Antioxidant131513224198510.21608/jpp.2017.41985ENE. E.MetwalyVegetable and Floriculture Dept., Faculty of Agric., Mansoura University. Mansoura, Egypt.R. S.El-ShatouryHorticulture Dept. (vegetable). Faculty of Agric., Suez Canal University. EgyptJournal Article20190724Two field experiments were carried out during the two winter seasons of 2015 and 2016 under clay loamy soil conditions using surface improving irrigation system at the Experimental Station, Faculty of Agriculture, MansouraUniversity, Dakahlia governorate, Egypt. to study vegetative growth and yield of cabbage (cv. o.s. cross) influenced by irrigation water deficit treatments in three levels include without stress as control (full irrigation), moderate and severe stresses (75 % and 50 % from the control, respectively) and foliar application with some antioxidants consisted of (without exogenous antioxidant, 0.3 g /l ascorbic acid, 0.1 g/l chitosan and 4.0 g/l glycine betaine) and their interactions. The results showed that increasing of irrigation water deficit led to significant decreases of vegetative growth characters (i.e. Plant height, foliage weight, leaves fresh weight, number of leaves, leaves area), Chemical composition of outer leaves (chlorophyll a, chlorophyll b, carotenoids, N, P and K), Heads yield and its physical and chemical qualities (head weight, edible head weight, edible head diameter, edible head compactness rate, Vit. C, TSS and total heads yield /fed.) and leaf relative water content. On contrast, edible head dry matter, electrolyte Leakage and water use efficiency percentage were increased. As for the impact of foliar application of antioxidant, results exhibited that, the previous parameters were increased compared to the control (without antioxidant) except electrolyte leakage. Chitosan at 0.1 g/l followed by 0.3 g /l ascorbic acid were recorded the highest values of most effective mentioned parameters. The interaction between irrigation water deficit and foliar application with some antioxidants showed that the combination of full irrigation and 0.1 g/l chitosan gave the highest values of most effective previous parameters. Also, insignificant differences were noticed between full irrigation or moderate stress treatments with antioxidant for most effective mentioned parameters.https://jpp.journals.ekb.eg/article_41985_afee3a2d64b9b587e036cc5ef088e113.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Effect of some Potassium Sources on Productivity and Quality of Pea under Conditions of Saline Soil132313284198710.21608/jpp.2017.41987ENE. E. M.IsmailHorticulture Research Institute, Agricultural Research Center, Giza.R. M.GalalFaculty of Agriculture - Beni Suef UniversityM. E.MahsebSoil, Water and Environment Research Institute, Agricultural Research Center, GizaJournal Article20190724This study was carried out during 2015 and 2016 seasons at a private Farm in Road Village in Sahl El-Husseiniya, Sharkia Governorate to study the influence of foliar spraying with three potassium sources at three concentrations from each of them i.e. potassium sulfate1,2 and 4 g/ L; potassium silicate at 1,2,and 4cm/L as well as potassium humate at 1,2 and 4 cm / L beside without foliar spraying (control) to reduce the bad effects salinity stress on growth, yield and quality of pea Master B cultivar under saline soil conditions. The experiment was carried out by using completely randomized blocks design with three replications. Spraying pea plants with potassium silicate (4 cm/L) significantly increased and created the maximum means of all studied traits (growth, yield and yield attributes and chemical constituents in the leaves and seeds) as compared to other studied treatment in the two seasons. Spraying with potassium silicate (2 cm/L) was the second best treatment, followed by potassium silicate at the rate of 1 cm/L, then potassium humate at the rate of 4 cm/L and 2 cm/L in the two seasons. Conversely, the lowest means of these traits resulted from control treatment in the two seasons. Overall, using potassium silicate at different rates as foliar application exceeded using potassium humate at different rates exceeded potassium sulfate at different rates in the two seasons. Concerning proline % in leaves, it had adverse trend comparing with other studied traits in the two seasons. Generally, it could be recommended that spraying pea plants through 4 cm potassium silicate/L to enhance growth, yield and yield components and chemical constituents of pea under the environmental conditions of same research.https://jpp.journals.ekb.eg/article_41987_248980424e2807a1b19a3b145da96178.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Effect of Tillage Technique and Herbicides on Weeds and Yield of Transplanted Rice.132913344199010.21608/jpp.2017.41990ENI. H.Abou El-DaragRice Department, Field Crops Research Institute, Agric. Res. CenterJournal Article20190724A field study was carried out at the experimental farm of Rice Department, Sakha, Kafr El-Sheikh, Egypt during 2016 and 2017 seasons to detect the effect of tillage technique and herbicides use on weeds and yield of transplanted rice. A strip plot design with four replicates was applied. Tillage techniques (Zero tillage + puddling, one tillage + puddling, two tillage + puddling and two tillage without puddling) were allocated in horizontal strips. Weed control treatments were weedy check, hand weeding, thiobencarb (Saturn 50 % EC) at recommended dose (2.4 kg ai ha<sup>-1</sup>) and penoxsulam (Granite 24% SC) at recommended dose (0.029 kg ai ha<sup>-1</sup>) were assigned as vertical plots. Weed flora and rice yields were considerably affected by tillage technique and weed control treatments<em>. Cyperus difformis</em>, <em>Ammania</em> sp., <em>Scirpus</em> sp. and total weeds dry weights were noticeably reduced fewer than two tillage + puddling plots than with other tillage technique. But <em>Echinochloa crus-galli </em>and<em> Echinochloa colona </em>were significantly reduced under zero tillage + puddling plots than under other tillage techniques. The highest values of panicles per unit area, panicle weight (g), filled grains / panicle, biological yield, grain yield (t ha<sup>-1</sup>) and harvest index of rice (%) were recorded under two tillage + puddling plots followed by one tillage + puddling than under other tillage techniques. The application of penoxsulam resulted in the best weed control and best rice grain yield (t ha<sup>-1</sup>) and its components under this study followed by the application of thiobencarb. Untreated (weedy check) plots gave the highest weed presence and the lowest rice yields and its components in 2016 and 2017 seasons under this study. For the interaction, the lowest values of dry weight for<em> Echinochloa crus-galli, Echinochloa colona, Cyperus difformis</em>, <em>Ammania </em>sp., <em>Scirpus</em> sp. and total weeds, in addition to the highest grain yield of rice was obtained under two tillage + puddling treated by penoxsulam 24% SC as the recommended dose during the two growing seasons. https://jpp.journals.ekb.eg/article_41990_81e4ed18cd09808ec9056a149252c6d2.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Role of Foliar Spraying with Biostimulants Substances in Decreasing Mineral Nitrogen Fertilizer of Sugar Beet133513434199410.21608/jpp.2017.41994ENW. A. E.AbidoAgronomy Department, Faculty of Agriculture, Mansoura University, Egypt.0000-0003-3028-2013M. E. M.IbrahimSugar Crops Research Institute, Agricultural Research Center, Giza, Egypt.Journal Article20190724In order to study the role of foliar spraying with biostimulants substances and fertilizing with nitrogen mineral fertilizer on productivity and quality of sugar beet, a field experiment was performed during 2015/2016 and 2016/2017 winter seasons at Tag Al-Ezz, Agricultural Research Station Farm, Dakahlia Governorate, Egypt. Strip-plot designs with four replicates were used. Spraying plants with 150 ml yeast extract/liter plus 1.5 ml humic acid/liter as mixture recorded the highest means of all studied characters. However, spraying with 150 ml yeast extract/liter came in the second rank, followed by spraying with 1.5 ml humic acid/liter, then spraying with water and lastly without (control treatment) in the two seasons. Decreasing mineral nitrogen fertilization from 100 to 85, 70 and 55% from the recommended dose (90 kg N/fed) caused gradual reduction in all studied characters, with exception sucrose and apparent purity in both seasons. Highest values of root, top and sugar yields per fed were recorded with adding 100 or 85 % from the recommended dose without significant differences between them during growing seasons. For maximizing sugar beet productivity and quality and decreasing environmental pollution and cost could be succeeded with spraying plants twice with the mixture of 150 ml yeast extract/liter plus 1.5 ml humic acid/liter and fertilizing with 76.5 kg N per fed as soil application under environmental conditions of Dakahlia Governorate, Egypt.https://jpp.journals.ekb.eg/article_41994_cfa55159f2e95e8341e4e30ca5b2b701.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Impact of Plant Arrangement and Density on Yield and its Components of Two Faba Bean Cultivars (Vicia faba L.).134513504199610.21608/jpp.2017.41996ENDalia A. A.El HagAgronomy Dept., Faculty of Agric., Kafrelshiekh UniversityJournal Article20190724In order to study the effect of plant arrangement (2 plants hill<sup>-1</sup> on one side and plant hill<sup>-1</sup> on two side of ridge) and hill spacing (15, 30 and 45 cm between hills) on seed yield and its components of two faba bean cultivars (Sakha 1 and Giza 843), an experiment was conducted in two growing seasons 2013/14 and 2014/15 winter seasons, in the farm of the Faculty of Agriculture, kafrelshiekh university, kafre-Elshiekh Governorate, Egypt. A split-split plot with four replications was used. The main plots were assigned to cultivars, the sub plots to plant arrangements and the sub-sub plots to hill spacing. The data collected were: plant height, number of branches/plant, number of pods/plant, number of seeds/pod, 100 seed weight, seed yield and harvest index. Results indicated that, the cultivar Sakha 1 was superior to Giza 843 on plant height, number of branches/plant, number of pods/plant, Seeds/pod, seed weight/plant, 100-seed weight, seed yield and harvest index % .Plants arranged on one side of ridge recorded taller height and higher harvest index than those arranged on two sides of ridges. The inverse was true in the other characters. The increases in plant density by narrowing the distance between hills resulted in significant decrease in number of pods/plant, number of seeds/pod, seed weight/plant, 100-seed weight and seed yield. However, plant height was increased by increasing plant density. Seed yield was significantly increased by increasing hill space from 15 to 30 cm. It can be concluded that sowing the faba bean cultivar ''Sakha 1'' on two sides of ridges 60 cm apart at 30 cm space between hills is the recommended treatment for optimum seed yield in Kafre El-Sheikh area.https://jpp.journals.ekb.eg/article_41996_d0f0a712568f8edc9e8b71377fd3b094.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201The Role of Seed Classes in Improving Purification and Productivity of Rice135113544199910.21608/jpp.2017.41999ENH. Sh.HamadRice Research section, Field Crops Research Institute, ARC, Giza, Egypt.E. F. A.ArafatRice Research section, Field Crops Research Institute, ARC, Giza, Egypt.W. T.Abdel-RaheemRice Research section, Field Crops Research Institute, ARC, Giza, Egypt.Journal Article20190724The field experimentes were conducted during 2016 and 2017 rice growing seasons. The investigation aimed to study the effect of seed classes i.e. breeder, foundation, registered and farmer and the studied cultivars i.e. Sakha 101, Giza 177, and Giza 178 on the productivity of rice <em>(Oriza sativa)</em>. Split plot design with three replications was used, the main plots were randomely occupied by four classes of seeds, while the cultivars Sakha 101, Giza 177, and Giza 178 were assigned to the sub plots. Results showed that, breeder seeds gave the highest grain yield (10.97 and 11.34 t ha-1) in 2016 and 2017 seasons, respectively. The highest grain yield (10.51 and 10.83 t/ha) was obtained from variety Sakha 101 in both seasons, respectively. The interaction between cultivars and seed classes was highly significant for germination (%), shoot length (cm), root length (cm), days to heading, number of tillers/hill, panicle weight (g), panicle length (cm), seed set (%), 1000-grain weight and grain yield, while not significant was found for plant height (cm) during 2016 and 2017 seasons. The results indicated that both of rice varieties and seed classes were important for increasing grain yield. https://jpp.journals.ekb.eg/article_41999_f42fcef54e1e9d5ddd0f2c847c493ae3.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Mathematical Models for Determination of the Critical Period of Weed Competition in Maize (Zea mays L.)135513624200210.21608/jpp.2017.42002ENR. M. H.TagourWeed Research Central Laboratory, Agricultural Research Center, Giza, Egypt.Journal Article20190724Two field experiments were conducted on maize during 2014 and 2015 summer seasons at EL-Serw Station, Damietta Governorate, Egypt. Each experiment included ten weed competition and weed removal treatments either at early or late times after sowing which were: - weed competition for the whole season, weed competition for 2, 4, 6 and 8 weeks from sowing, weed free for 2, 4, 6 and 8 weeks from sowing and weed free for the whole season, to determine when a natural infestation of weeds start to reduce maize yield and when to control without yield losses in maize. The most appropriate study of the critical period of weed competition is on the weed community as a whole than single weed specie. Dominant major weeds in experimental fields were<em> Portulaca oleraceae</em>, L.; <em>Corchorus olitorius,</em> L.; <em>Amaranthus caudatus</em>, L.;<em> Echinochloa</em> <em>crus-gali</em>, L. and<em> Echinochloa colonum, </em>L. The obtained results revealed that which weed infestation rate under maize field was 5.834 and 6.043-ton fresh weight / fed.,which reduced drastically grain yield of maize /fed by 56.8 to 57.2 % under weed competition treatment of maize for the whole season in 2014 and 2015 summer seasons, respectively as compared with weed free for whole season treatment. The use of response curves with weed free or weed competition periods showed that grain yield of maize / fed were the highest with the field free from weeds until seven weeks after sowing and the critical period of weed / maize competition was between 3 to 7 weeks after sowing. In regression approach for maize grain yield and weed free or weed competition period the polynomials (linear and quadratic) and logistic functions were tested and quadratic function was fitted to estimate the expected yields which had the high significant with the data recorded and have the highest values of R<sup>2</sup> than the other models (linear or logistic model.) for this reason it is used to estimate predict yield losses due to weed competition periods with maize. Also, results showed that the quadratic equations were significant and had the highest R<sup>2</sup> (0.990 and 0.985) for weed free period, and (0.994 and 0.993) for weed competition durations in 2014 and 2015 summer seasons, respectively. The important stage of weed competition to maize is the 1-9 weeks period from sowing was required to be weed free showed that to maintain 95% of maximum grain yield of maize and one week of weeds infestation can be allowed after maize sowing without grain yield maize reduction. This information should be taken in consideration for maize growers to plan their strategies of integrated weed management for this important crop. It could be concluded that weeds should be removed within the period of first week and nine weeks in maize crop to pass up 5 and 10% grain yield reduction, respectively.https://jpp.journals.ekb.eg/article_42002_32a03f1c620506e114d39927ec68d675.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Heterosis and Combining Ability Studies for Grain Yield and some Contributing Traits in Bread Wheat (Triticum aestivum L.) under Normal and Late Sowing Conditions.136313724200610.21608/jpp.2017.42006ENM. H.MotaweaDepartment of Agronomy, Faculty of Agriculture, Sohag University, Sohag, Egypt.Journal Article20190724Seven parental cultivars of bread wheat (<em>Triticum aestivum </em>L.) were used in a half diallel mating design at the Experimental Farm of Faculty of Agriculture, Sohag University, Egypt, during the two successive seasons of 2013/2014 and 2014/2015 to study combining ability and heterosis and their interactions under two sowing dates , 15<sup>th</sup> November ( normal sowing date) and 15<sup>th</sup> December ( late sowing date ) in two adjacent experiments, for days to heading, No. of spikes/plant, 1000- grain weight and grain yield/plant. Sowing dates mean squares was highly significant for all studied traits. Genotypes mean squares was highly significant for all studied traits at the two sowing dates and their combined. The overall means of genotypes were (88.98, 83.76 and 86.37days) for days to heading; (13.87, 10.00 and 11.94) for No. of spikes/plant; (47.26, 35.41 and 41.34g) for 1000-grain weight and (39.43, 24.58 and 32.01g) for grain yield/plant on the normal, late sowing dates and their combined, respectively. Late sowing date (heat stress) caused reduction for days to heading (5.87%), No. of spikes/plant (27.90%), 1000-grain weight (25.07%) and grain yield/plant (37.66 %), compared with normal sowing date (favorable). Interaction of sowing dates with genotypes was highly significant for all studied traits. General combining ability (GCA) and specific combining ability ( SCA ) mean squares was significant for all studied traits at the both sowing dates and their combined, except general combining ability mean squares for 1000-grain weight and grain yield/plant for the combined data. Genetic analyses of these traits confirm the participation of both additive and non-additive gene effects in controlling their inheritance. The interactions of sowing dates with general combining ability were found to be not-significant for all studied traits, whereas the interactions of sowing dates with specific combining ability were found to be significant for all studied traits. The ratio of GCA to SCA variance (predictability ratio) was closer to 1 for all studied traits, except for No. of spikes/plant and grain yield/plant at normal sowing date that revealed the predominance of additive gene action in the inheritance. The parental line (P<sub>5</sub>) proved to be the good general combiner for grain yield/plant at the two sowing dates and their combined. Hybrid combination (P<sub>1</sub> × P<sub>4</sub>) showed highly significant desirable SCA effects for days to heading, No. of spikes/plant, 1000-grain weight and grain yield/plant. Six cross combinations (P<sub>1</sub> × P<sub>2</sub>)<sub>,</sub> (P<sub>1</sub> × P<sub>4</sub>)<sub>,</sub> (P<sub>1</sub> × P<sub>6</sub>), (P<sub>2</sub> × P<sub>4</sub>), (P<sub>4</sub> × P<sub>5</sub>) and (P<sub>4</sub> × P<sub>6</sub>), exhibited significant desired heterosis for grain yield/plant which varied from ( 10.8% ) to ( 35.38% ) relative to their better parents at both normal and late sowing date levels.https://jpp.journals.ekb.eg/article_42006_0261ef8322aa45a2aef45ddb425e7c72.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Induction of Genetic Variability for some Agronomic Traits and Blast Disease Resistance in Egyptian Rice Variety Sakha101137313814201110.21608/jpp.2017.42011ENY. Z.EL-RefaeeRice Res. Dep., Field Crops Res. Inst., Agric. Res. Center, Egypt.A. A.HadifaRice Res. Dep., Field Crops Res. Inst., Agric. Res. Center, Egypt.R. A. S.EL-ShafeyRice Res. Dep., Field Crops Res. Inst., Agric. Res. Center, Egypt.Journal Article20190724The present study was undertaken to assess the differential sensitivity of Egyptian rice variety Sakha101 to gamma radiation, to study the genetic variability induced and to get desirable phenotypic mutants especially of economic importance traits and blast disease resistance. The study was conducted at the Experimental Farm of Sakha Agricultural Research Station, Kafr El-Sheikh, Egypt, during 2016 and 2017 rice growing seasons. Four gamma ray doses; 100, 200, 300 and 400 Gy were used to treat the seeds of the Egyptian rice variety Sakha 101. The results illustrated that heading date was early in all doses applied in M<sub>1</sub>-generation, except in 400 Gy. Plant height was decreased by increasing gamma irradiation in both M<sub>1</sub> and M<sub>2</sub>-generations. Number of panicles/plant were decreased by using the dose of gamma rays for 100 and 200Gy, while it increased for 300 and 400 Gy treatments in both of M<sub>1</sub> and M<sub>2</sub> generations. The doses of gamma rays increased the means of sterility % and 100-grain weight in both of M<sub>1</sub> and M<sub>2</sub>-generations. For grain yield/plant, the mean values decreased by increasing the dose of gamma rays up to 300 Gy while, increased at 400 Gy, where the grain yield per plant increased by 47.7 grams as compared with the control (44.0 grams) in M<sub>2</sub>-generation plants. All studied genetic parameters viz, genotypic variance (GV), genetic coefficient of variation (GCV), heritability in broad sense (h<sup>2</sup>bs) and genetic advance of mean (GS%) increased by increasing the dose of gamma rays in M<sub>2</sub>-generation indicating individual plant selection for these characters should be effective and satisfactory for successful breeding purposes. A total of 101 M<sub>2</sub> mutant plants were found to be earlier in heading by 10-20 days than the mean value of the original variety Sakha 101; and 105 mutant plants were having grain yield/ plant more than 42 grams comparing with its original plants. About 591 plants from different irradiated treatments were found to be resistant to blast disease from M<sub>2</sub>-generation plants. Hence, the induced genetic variability is consider important as it is a basic requisite for successful rice breeding program via direct selection or by crossing with the commercial cultivated varieties.https://jpp.journals.ekb.eg/article_42011_53f3f03f6803fd929b419c8cdb58f6c5.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Evaluation of some Bread Wheat Genotypes under Saline Soil Conditions Using Tolerance Indices and Multivariate Analysis138313944201410.21608/jpp.2017.42014ENM. A. H.DarwishWheat Research Department, Field Crops Research Institute, ARC, Egypt.W. M.FaresCentral Laboratory for Design & Statistical Analysis Research, ARC, Egypt.Eman M. A.HusseinCentral Laboratory for Design & Statistical Analysis Research, ARC, Egypt.Journal Article20190724The present investigation was conducted in a field experiments at Sakha Agricultural Research Station Farm to evaluate 24 bread wheat genotypes during the two growing seasons 2014/2015 and 2015/2016 under normal and salinity stress conditions. The experimental design used was a randomized complete block design with three replicates. Eleven stress tolerance indices (STI's) were calculated based on average grain yield under normal and stress conditions across the two seasons. Moreover, cluster analysis was performed to identify the similarity/dissimilarity among the tested genotypes for grain yield and salinity tolerance. Results showed large values of broad-sense heritability (h<sub>b</sub><sup>2</sup>) coupled with high values of genetic advance as a percent of mean (GA%) at 5% selection intensity for number of spikes/m<sup>2</sup> and number of grains/spike in the adequate site. Concerning the salt stressed soil, the grain yield ratio, number of spikes/m<sup>2</sup> and grain yield recorded the highest values of h<sub>b</sub><sup>2</sup> and GA%. However, there were crucial differences among tested genotypes in respect to grain yield under non-stress and salt stress sites, which demonstrates high genetic diversity among them that enabled us to screen salt tolerant genotypes. Already, the tested wheat genotypes exhibited different responses for salinity stress tolerance indices (STI's). Perfect and positive correlation coefficients (r = 1) were found between three pairs of indices (STI and GMP), (SSPI and TOL) and (CV and SSI) where each one of the previous three pairs occupied one dot on the biplot graph indicating that the three indices are identical for ranking genotypes for salinity tolerance and they could be interchangeably used as a substitute for each other. Therefore, using these pairs of (STI's) together in the same study is considered a waste of time and effort. The cluster analysis classified the tested genotypes into five main groups (clusters) where each group contained the genotypes that showed similar yield potential and salinity tolerance. The fifth cluster contained two promising genotypes namely; lines 2 and 17 that were characterized by moderate grain yield in each of the normal and salt soils recording the lowest grain yield reduction. Also, they occupied the first and second ranks among the tolerant genotypes for salinity stress. Accordingly, results would give a good chance to achieve genotypic improvement of wheat through the hybridization among genotypes taken from different clusters.https://jpp.journals.ekb.eg/article_42014_4b876888a0210b4eb5c1b6f2a2e75d3e.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Response of Two Eggplant Cultivars to Irrigation Intervals and Foliar Application with some Antitranspirants.139514014201510.21608/jpp.2017.42015ENM. A.Abd El-HadyVeget. and Flori. Dept., Fac. Agric., Damietta Univ., Egypt.Samar M. A.DoklegaVeget. and Flori. Dept., Fac. Agric., Mansoura Univ., Egypt.Journal Article20190724Two field experiments were conducted at the Experimental Station Farm, Faculty of Agriculture, Mansoura University, Egypt, during summer seasons of 2015 and 2016 to study the effect of three irrigation intervals (10, 15 and 20 days) and five antitranspirants as a foliar application (Control, Kaolin, Jojoba oil, Glycerol and Green miracle) on two cultivars of eggplant (long white and long black) and their interactions on vegetative growth, yield and fruits quality. Obtained data revealed that long blackcultivar gave significantly increases in vegetative growth parameters, in the contrary; concerning number of fruits/plant, early yield, total yield and quality parameters <em>i.e.</em> crude protein in the first season and crude fiber in both seasons; long white cultivar was more superior with significant differences. Moreover irrigation intervals every 10 days gave significant increments in vegetative growth, yield and its component, while quality determinations values <em>i.e.</em> crude protein, total carbohydrates, crude fiber and vitamin c were increased significantly when irrigation intervals were every 15 days. Concerning foliar application treatments, jojoba oil spraying gave significant superiority comparing to other spraying treatments in vegetative growth measurements, yield and its components while green miracle produced the highest significant values of quality parameters <em>i.e. </em>crude protein, total carbohydrates, crude fiber and vitamin C. It could be recommended that using antitranspirants would improve eggplant cultivars productivity and quality under prolongation of irrigation intervals (every 15 days) especially in the dry hot weather.https://jpp.journals.ekb.eg/article_42015_52cf96dd6cd25522a41c469f56c953a1.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Improving Fruit Set and Productivity of Barhee Date Palm under Heat Stress Conditions140314084201710.21608/jpp.2017.42017ENE. M. A.Zaen El–DaenPlant Production Department, Desert Research Center, Cairo, Egypt.S. El-MerghanyPlant Production Department, Desert Research Center, Cairo, Egypt.I. E.Abd El-RahmanPlant Production Department, Desert Research Center, Cairo, Egypt.Journal Article20190724<span>This study was conducted during 2016 and 2017 seasons on about 10 years-</span><span>old Barhee date palm trees grown in Agriculture Research Center farm at Toshka, </span><span>Aswan</span><span> Go</span><span>vernorate, Egypt, as an attempt to solve pollination problems of Barhee date palm cultivar under heat stress. Seven pollination treatments were applied on flowers (T1) the normal (control) pollination by inserting ten male strands / female spathe, (T2) spray female spathes by sugar solution at 4g\L and then pollen grains were pushed out, (T3) pollen grains suspended in sugar solution at 4g\L and then spray on female spathes, (T4) spray female spathes by Borax solution at 4g\L and then pollen grains were pushed out, (T5) pollen grains suspended in Borax solution at 4g\L and then spray on female spathes. (T6) spray female spathes by NAA solution at 0.5g\L and then pollen grains were pushed out and (T7) pollen grains suspended in NAA solution at 0.5g\L and then spray on female spathes. </span><span>Results revealed that spraying sugar, borax and NAA solution on female spathes of Barhee date palm before pollination or suspended with pollen grains significantly improved fruit set and retention besides, increased bunch weight, palm yield, fruit physical and chemical properties comparing with pollination by traditional method (control). The best treatment in this study was spraying female spathes by Borax solution at 4g\L and then pollen grains were pushed out. This study recommends spraying female spathes by Borax solution at 4g\L before pollination Barhee date palm trees under heat stress conditions.</span>https://jpp.journals.ekb.eg/article_42017_8868778540ca59d0269bdcee3c00a795.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Possibility of Sugar Beet Production in Toshka Region -: I. Assessment of the Optimum Harvesting Age140914154201910.21608/jpp.2017.42019ENA. Z.AhmedAgron., Technol. Res. Dept., Sugar Crops Res. Inst., ARC, Giza, EgyptA. O.AwadallaAgron., Dept. Fac. Agric. and Natu. Reso., Aswan Univ., Aswan, EgyptSakina R.AbazidAgron., Technol. Res. Dept., Sugar Crops Res. Inst., ARC, Giza, EgyptJournal Article20190724Two field trails were carried out at the Farm of South Valley Development Company, Toshka, (latitude of 22<sup> o</sup>.49<sup>-</sup> N, longitude of 28<sup> o</sup>.58<sup>-</sup> E and an elevation of 188 m above sea level) Aswan Governorate, Upper Egypt in 2014-2015 and 2015-2016 seasons. These trials aimed to find out the optimum harvesting age (180, 195, 210 and 225 days) for five sugar beet varieties four of them are multi-germ varieties namely Misribel, Halawa, Husam, and Habiba and one is mono variety namely Natora. The experimental design was a factorial experiment conducted in a complete randomized block design with three replications. Results indicated that delaying harvesting date up to age 225 days significantly increased root length, root diameter, sucrose, purity, extractable sugar and extractability percentages as well as root and sugar yields/fad. Root contents of impurities (α-amino N, Na and K) were significantly influenced by delaying the harvest age. Results showed that sugar beet varieties differed significantly in root length, root and sugar yields/fad. as well as sucrose, purity, impurities percentages. Under the conditions of Toshka region, the results suggested that harvesting Misribel variety at age of 210 days can be recommended to produce the best quality as well as the highest root and sugar yields/fad.https://jpp.journals.ekb.eg/article_42019_92801e03cf9508f8c9e39155746ce4ae.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Combining Ability in F1 Generation for Diallel Crosses for Yield and Yield Components in Wheat (Triticm aestivum, L.)141714204202110.21608/jpp.2017.42021ENM. H.HaridyAgronomy Department, Faculty of Agriculture, Al- Azhar UniversityJournal Article20190724The combining ability and heterosis have been analyzed in a 6-parents F<sub>1</sub> diallel cross for yield and its components. The experiment was conducted at the Experimental Fam., Faculty of Agricultural, Al-Azhar University(Assiut Branch). The analysis of variance indicated highly significant differences in among 21 enter for plant height, number of spikes/plant, spike length (cm), grain weight/spike,(gm), 100-grain weight(gm) and grain yield/plant(gm). Variance due to general combining ability as well as specific combining ability were highly the above mentioned traits. However, the ratio of genetic components ∑gi<sup>2</sup> /∑sij<sup>2</sup> was less than unity of the non-additive genetic variance in the inheritance of all the above traits. Heterosis effects over mid and better parents were shown in F<sub>1</sub> hybrid for all studied characters. https://jpp.journals.ekb.eg/article_42021_c8eb70861b85bc6e4cd48807e642ca63.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Effect of some Treatments on Reducing Salinity Injuries Effect on Growth, Yield and Quality of Eggplant142114294202810.21608/jpp.2017.42028ENE. E. M.IsmailHort. Res. Inst., Agric. Res. Center, Giza.M. A. M.ShattaAgric. Economic Dept., Fac. of Agric., Mansoura Univ., Egypt.Journal Article20190724A field experiment was carried out at a private Farm in Rowad Village belong to Sahl El-Husseiniya, Sharkia Governorate during the two growing seasons of 2016 and 2017 to study the effect of spraying potassium silicate and adding ammonium thiosulfate (ATS)as soil drenching at three levels on vegetative growth, yield and its components and chemical constituents of eggplant grown under salinity soil( Black Beauty cultivar). The experiment was carried out by using split-plots system in a randomized complete blocks design with three replications. The main plots were arranged with potassium silicate treatments. While, the sub-plots assigned to ammonium thiosulfate levels. The obtained results of this investigation can be summarized as follows: Foliar spraying eggplant plants with potassium silicate levels significantly improved vegetative growth, the yield and its components along with chemical constituents either in the leaves or in the fruits compared with control treatment during both seasons. The highest values of these traits were resulted from using concentration of 6 cm potassium silicate/L in both seasons. Concerning to the effect of ammonium thiosulfate ,it can said that vegetative growth, yield and its components and chemical constituents of either the leaves or in the fruits of eggplant were significantly influenced by different ammonium thiosulfate (ATS) levels adding as drenching around the plants in the both seasons. The maximum values of these characters were produced from using 15 L/fed or 10 L/fed of ATS, respectively in both seasons.While the favourable results on the growth,yield and its components as well as the chemical constituents in the leaves or the fruits were obtained from the interaction between the treatment of foliar spray with 6 cm potassium silicate and adding 15 L/fed from ammonium thiosulfate as soil drenching to obtain the highest results. For that, it could be recommended that foliar spraying eggplant plants grown under salinity soil with 6 cm potassium silicate/L 3 times with using 15 L ATS/fed as soil drenching to enhance vegetative growth characters, yield and its components and chemical constituents of eggplant fruits under the environmental condition of this research.https://jpp.journals.ekb.eg/article_42028_8cbb1a582b28ffe2d18d6d02724cfc8c.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Influence of Natural Extracts Dipping to Maintenance Fruit Quality and Shelf Life of Egyptian Guava143114384203010.21608/jpp.2017.42030ENE. E.EL-EryanFruit Handling Department, Horticulture Research Institute, Agricultural Research Center, Giza, EgyptM. E.TarabihFruit Handling Department, Horticulture Research Institute, Agricultural Research Center, Giza, EgyptM. A.EL-MetwallyMycological Research Department, Plant Pathology Research Institute, Agricultural Research Center, Giza, EgyptJournal Article20190724Guava fruits are considered sensitive to low temperature and susceptible to infection by decay causing fungi making its transport and storability difficult. Use of plant extracts which having fungicidal and insecticidal properties is one of the alternative methods against fungi causing guava decline disease caused by <em>Phomopsis psidii</em>, <em>Lasiodiplodia theobroma</em> and <em>Epicoccum sp</em>p. Therefore, the present investigations were conducted during 2016 and 2017 seasons on guava fruits cv. Bassateen El Sabahia for maintaining quality and control disease development under cold and ambient conditions. The guava fruits were harvested at physiological maturity stage during the third week of January and treated with marigold flower extract, neem extract and mentha leaf extract at (10%) as dip treatment for 5 minutes. (Experiment 1).Treated fruits were packed in ventilated Corrugated Fibre Board (CFB) boxes and stored 28 days under cold storage at 6° C ± 2° and humidity 90-95% R.H. (Experiment 2). The fruits were stored for 6 days in ambient conditions at 15° C ± 2° with 65 – 70 % R.H. Under both of the storage conditions, all treatments exhibit potential to maintain the postharvest life of fruits by reducing linear growth and dry weight of the fungal spoilage as compared with untreated fruits. The lowest significant values of disease infection percentage were recorded by dipping fruits in neem leaf extract at 10% after 28 days of cold storage and 6 days at marketing in the two seasons. Among all extracts, neem in combination with (CFB) boxes effective in registered higher potential to retain the fruit quality for longer period under both conditions by reducing the weight loss, fruit spoilage and retaining the fruit firmness and quality attributes such as TSS, sugars, vitamin C and pectin. On the other hand, 10% Mentha leaf extract followed by marigold flower extract treatments proved to be highly effective in reducing spoilage under these treatments with respect to the untreated ones. Generally, the promising effects of these treatments showed that the winter season guava fruits can be stored up to 28<sup>th </sup>day under cold storage and up to 6<sup>th</sup> day under ambient condition without deteriorating the fruit quality.https://jpp.journals.ekb.eg/article_42030_5c309952366de9e696f0759050d20fd9.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366981220171201Estimates of Heterosis and Gene Action for Yield Components and Fiber Traits in Gossypium barbadense, L143914444203110.21608/jpp.2017.42031ENM. H. M.OrabiCotton Research Institute, ARC, GizaSamia E.AliCotton Research Institute, ARC, GizaH. A.El-HoseinyCotton Research Institute, ARC, GizaEman M. R.SalehCotton Research Institute, ARC, GizaJournal Article20190724The present work was carried out in three successive seasons from 2014 to 2016.at Sakha Experimental Station at Kafr El-Sheikh Government, AgriculturalResearchCenter. Four cotton genotypes i.e., Giza 94, Uzbekstan1, TNB and BBB as (lines) which were crossed to two genotypes i.e., CB 58 and Giza 45 as (testers) by using the mating design line x tester. General (GCA) and specific (SCA) combining abilities and their effects as well as heterosis and heritability were estimated in parents, F<sub>1</sub>'s and F<sub>2</sub>'s populations for the traits, yield and its components and fiber properities to define the best parents and crosses to be used in breeding programs to improve cotton traits. Giza 94 x CB 58 gave the highest mean performance values in F<sub>1</sub>’s for seed and lint cotton yields/ plant, fiber length and its uniformity while, for boll weight in both F<sub>1</sub>’s and F<sub>2</sub>’s crosses for the cross of Uzbekstan1x CB 58 had the highest mean performance value in F<sub>2</sub>’s crosses for seed and lint cotton yields/ plant while for the cross BBB x CB 58, it gave the highest mean performance in both F<sub>1</sub>’s and F<sub>2</sub>’s crosss for lint %. All the tested crosses showed significant positive mid-parent heterosis. SCA variances were higher in magnitude as compared to the GCA ones. The nonadditive gene effects were larger in magnitude than the additive ones and revealed the major role in the heredity of all traits under studying. The two crosses Giza 94 x CB 58 and BBB x Giza 45 ranked first in this respect. The line Giza 94 and, the tester Giza 45 had the best ranking as combiners for almost traits. The estimated proportion contributions of used lines were higher in magnitude than those of both testers and lines by testers interactions for the following traits: seed cotton yield/ plant, fiber length and Uniformity ratio; while testers proportion contributions were higher than those estimated for lines and lines by testers interactions for boll weight, lint % and fiber strength. The higher value of broad-sense heritability (99.0%) was recorded for the trait seed cotton yield /plant and the lower value (26.12 %) was recorded for fiber length in F<sub>2</sub>. Heritability estimates in narrow-sense ranged from 0.25 - 29.31 % for uniformity and lint %, respectively. The cross Giza 94 x CB 58 could be used in breeding program for improving seed and lint cotton yields due to both parents. Giza 94 and CB 58 varieties were first in ranking as combiners for yield and its component. In addition the hybrids BBB X CB 58 and Uzbekstan1 X CB 58 could be used for improving the same traits because one of the involved parents was good combiner. https://jpp.journals.ekb.eg/article_42031_16aff09215a3a019ca2d06da87af4cf9.pdf