@article { author = {El-Ghonemy, M. and Ibrahim, M.}, title = {DIALLEL ANALYSIS OF YELLOW MAIZE FOR COMBINING ABILITY AND HETEROSIS}, journal = {Journal of Plant Production}, volume = {1}, number = {6}, pages = {779-792}, year = {2010}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2010.86407}, abstract = {One way cross among developed seven yellow maize inbred lines was made at Gemmeiza. Agricultural Research Station during 2006 growing season. Parents, their F1 crosses and four yellow single crosses i.e. checks (SC 155, SC 162, SC 164 and SC 3084 ) were evaluated at Gemmeiza and Sids Agricultural Research Stations in 2007  growing season. Data were recorded for grain yield , days to 50 % silking, plant and ear heights , ear position , resistance to late wilt and number of ears/plant. Data were analyzed according to method-2 model-1 procedure Griffing (1956). The results indicated that mean squares due to locations were significant for all traits, except resistance to late wilt. Genotypes mean squares, their partitions and their interaction with locations were significant for most studied traits . General and specific combining ability (GCA and SCA) mean squares were significant for all of the studied  traits. The magnitude of  GCA / SCA  ratio  less than the unity indicating that the non-additive and additive gene action are more important for the studied traits. Significant interaction between locations and both types of combining ability were detected for all traits except number of ears /plants . The inbred line Gm.209 has positive GCA effects for earliness and short plants, moreover the inbred line Gm. 206 exhibited desirable and  positive GCA effects for resistance to late wilt and grain yield traits.  four crosses Gm.220 x Gm. 205 (33.91), Gm.220 x Gm.203 (33.37), Gm.206 x Gm.203 (33.51) and Gm.206 x Gm.220 (33.31) ard/fed show significantly positive heterotic effects relative to commercial hybrid SC 162 (30.26) ard/fed . These crosses could be advanced to the second evaluation steps for releasing as promising hybrids in maize breeding program.}, keywords = {Combining ability,Heterosis,gene action,Maize}, url = {https://jpp.journals.ekb.eg/article_86407.html}, eprint = {https://jpp.journals.ekb.eg/article_86407_041185a3391ee88c14a9f7b44b94824b.pdf} } @article { author = {El–Boraie, E. and Massoud, Hekmat and Badawya, M.}, title = {PHYSIOLOGICAL STUDIES ON SEED GERMINATION OF Magnolia grandiflora L.}, journal = {Journal of Plant Production}, volume = {1}, number = {6}, pages = {793-804}, year = {2010}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2010.86408}, abstract = { Magnolia grandiflora is highly ornamental and decorative evergreen tree which has a white flowers with aromatic odor. In Egypt, it is grown in botanical and private gardens. The essential oil from flowers have many medical uses. A study was carried out during two successive seasons of 2006/2007 and 2007/2008 at the Experimental Station and Laboratory of Horticulture Department, Fac. of Agriculture, MansouraUniversity. The study aimed to improve seed germination of Magnolia grandiflora, with different treatments such as distilled water soaking, soaking in GA3 at (500,1000 and 2000 ppm), soaking in kinetin at (25,50 and 100 ppm) for 24 hours alone or in combination with cold stratification for (45 and 90 days). The results of this study can be summarized as follows: - 1 - All treatments increased germination percentages than control. 2 - The highest germination percentages were (94.74, 96.51 %) and (91.24,  92.96 %) by soaking seed in GA3 (2000 ppm) and kinetin (100 ppm) combined with cold stratification for 45 days, while soaking in distilled water were (38.60, 40. 38 %) and the control (28.84, 30.46 %) in the two seasons respectively. 3 - Also soaking seeds in GA3 2000 ppm for 24 h, combined with cold stratification for 45 days gave the tallest plants (25.90, 25.97 cm) and the maximum number of leaves (9.33, 9.44) in the two seasons respectively. 4 - In addition total phenols was significantly decreased with the previous treatment since it were (0.131, 0.128 mg/100gDW) while in control were (0.179, 0.177 mg/100gDW) and reducing sugar percentages significantly increased, since it were (5.95, 6.08 %) while control values were (5.51, 5.55 %) during the two seasons respectively . From the present study it could be concluded that, the best germination percentage, of Bull Bay (Magnolia grandiflora L.) plant, vegetative growth (the tallest plant and maximum number of leaves) , the minimum total phenols  and maximum reducing sugar (%) were obtained from soaking seeds at GA3 2000 ppm for 24 hours combined with cold stratification for 45 days .}, keywords = {}, url = {https://jpp.journals.ekb.eg/article_86408.html}, eprint = {https://jpp.journals.ekb.eg/article_86408_b87e82a51a17f28ab842912ca882d7e0.pdf} } @article { author = {Kassab, M. and Moursi, E. and Ibrahim, M.}, title = {WATER REQUIREMENTS FOR SOME WHEAT CULTIVARS IN NORTH NILE DELTA}, journal = {Journal of Plant Production}, volume = {1}, number = {6}, pages = {805-818}, year = {2010}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2010.86409}, abstract = {Two field experiments were carried out at Sakha Agricultural Research Station, Kafr El-Sheikh Governorate, North Nile Delta region during the two growing seasons (2008/2009 and 2009/2010) to find out the response of some wheat cultivars to different irrigation levels. Four wheat cultivars were subjected to 3 irrigation levels based on: soil moisture depletion (SMD) in the effective root zone, Ibrahim’s equation (ETP = 0.1642 + 0.8 EP) and watering till 5.0 cm above the soil surface. The wheat cultivars were: Sakha 93, Giza 168, Gemmeiza 7 and Gemmeiza 9. The most important results could be summarized as follows: The highest mean values of grain yield were recorded from Giza 168 wheat cultivar and the lowest mean values were obtained from Gemmeiza 9. Concerning irrigation treatments, the mean values of wheat grain yield can be descended in order as follows; irrigation till 5.0 cm > Ibrahim’s equation > soil moisture depletion (SMD). For straw yield, the highest mean values were recorded from Sakha 93 and Gemmeiza 7 with values of 6444.31 and 6486.03 kg/fed., respectively. Regarding irrigation treatments the highest mean values were recorded with Ibrahim’s equation and the mean values were 6175.27 and 6161.43 kg/fed. in the first and second growing seasons, respectively. The mean values for biological yield, the highest mean values were recorded under Giza 168 wheat cultivar in the two growing seasons and with irrigation till 5.0 cm above soil surface. The mean values          of 1000 grain weight can be descended in order as follows: Giza 168 > Sakha 93 > Gemmeiza 7 > Gemmeiza 9 for irrigation treatments, the highest mean values were recorded with irrigation till 5.0 cm above soil surface. Moreover, the highest mean values of harvest index were recorded under Gemmeiza 9 wheat cultivar and under irrigation till 5.0 cm above soil surface. For water relations, the mean values of water utilization efficiency (W.Ut.E) and water use efficiency (W.U.E.) were obtained from Giza 168 wheat cultivar and irrigation according to soil moisture depletion (SMD). The values of actual waterconsumptive use for all studied cultivars were rather similar but under Gemmeiza 9 the mean values were slightly higher. While, the highest found mean values were under irrigation till 5.0 cm above soil surface. Values of water applied for the studied wheat cultivars can be descended in order as followsGiza 168 > Gemmeiza 9 > Gemmeiza 7 > Sakha 93. While, for irrigation treatments the mean values can be descended in order irrigation till 5.0 cm > SMD > Ibrahim’s equation.}, keywords = {}, url = {https://jpp.journals.ekb.eg/article_86409.html}, eprint = {https://jpp.journals.ekb.eg/article_86409_0e47fa355cd92e2f050d9fa0edd1c3a4.pdf} } @article { author = {Abd El-Hamed, Kh. and Elwan, M.}, title = {GENOTYPE BY ENVIRONMENT INTERACTION AND PHENOTYPIC STABILITY OF YIELD AND QUALITY IN BROCCOLI (Barassica oleracea VAR. ITALICA).}, journal = {Journal of Plant Production}, volume = {1}, number = {6}, pages = {819-835}, year = {2010}, publisher = {Mansoura University, Faculty of Agriculture}, issn = {2090-3669}, eissn = {2090-374X}, doi = {10.21608/jpp.2010.86411}, abstract = {Better understanding of genotype and environment interaction will help to optimize yield and quality of crops. The objective of this study was to partition the phenotypic variance of yield and quality traits in broccoli into component sources associated with genotype, environment and genotype by environment interaction. In addition, compare the patterns of stability across environments. Three broccoli genotypes have been evaluated in three different growing seasons for yield and both nitrate and vitamin C content. The results revealed a phenotypic variation in all studied traits among broccoli genotypes. A greater proportion of the phenotypic variation was associated with differences among environments. Analysis of variance uncovered a significant effect of genotypes for yield and chemical quality traits which indicates the existence of a high degree of genetic variability in the tested genotypes. Genotype by environment interaction was significant for yield and chemical quality traits indicating that these traits are modified to different levels by the environments where they grown and emphasis on  the need for testing genotypes in multiple environments to obtain reliable results.  The stability analysis revealed that different degrees of stability are existed among genotypes for yield and chemical quality.}, keywords = {Broccoli,yield,Quality,nitrate content,vitamin c,genotype by environment interaction,Stability analysis}, url = {https://jpp.journals.ekb.eg/article_86411.html}, eprint = {https://jpp.journals.ekb.eg/article_86411_60a8bc1efa642269bd04632ab016a743.pdf} }