Mansoura University, Faculty of AgricultureJournal of Plant Production2090-366914120230101Egyptian Cucumber Germplasm Genetic Diversity as An Approach for Developing Novel Hybrids under Heat Stress Conditions11127908510.21608/jpp.2022.179569.1199ENEman EL-RemalyCross-Pollinated Vegetables Research Department, Horticultural Research Institute, Agricultural Research Center, Giza 12619, Egypt0000-0002-8875-9876A. S. A.ShehataVegetable Crops Department, Faculty of Agriculture, Cairo University, Giza 12613, Egypt; ahmed.abdallah@agr.cu.edu.eg (A.S.A.S)Journal Article20230109Climate changes are critical global challenges limiting crop development and productivity. Plant breeding is an exceptional solution for providing thermotolerant genotypes. Plant breeding efficiently is a unique solution for providing food security worldwide. The germplasm genetic diversity of cucumber parental lines should support the release of new hybrids. In this study, A half-diallel design mating was performed with six parental cucumber lines to produce 15 hybrids under heat stress conditions in 2019. In 2020 and 2021, all genotypes were evaluated under heat stress conditions, using a randomized complete block design. The analysis of variances revealed significant differences among all genotypes. The mean performance showed that the hybrid, Parent 1×Parent 2 (P1× P2) was the superior hybrid, followed by Parent 1 (P1) for growth and yield components. The descriptive evaluation adequately demonstrated the greatest variation among all genotypes. The genetic distance between parental lines was divided into two groups based on their genetic bases. General combining ability (GCA), specific combining ability (SCA), and heterosis results revealed that P1 and P2 exhibited the highest effects of GCA in the desirable direction for vegetative, yield, and earliness traits. However, P3 showed the highest effect on most fruit traits. According to SCA effects and heterosis, the hybrids P1×P2, P1×P3, and P2×P5 demonstrated superiority in most traits. The selective parents were the good combiners by accumulative selective genes, which could be valuable in hybridization to produce new various prospective hybrids.https://jpp.journals.ekb.eg/article_279085_4ed87051e2f5edc0bc390e369590cf84.pdfMansoura University, Faculty of AgricultureJournal of Plant Production2090-366914120230101Response Growth, Yield, and Quality of Celery Plants to Foliar Spray with some Organic Extracts132028060110.21608/jpp.2023.178258.1193ENDoaa A.M.GadDepartment of application, Central Laboratory for Agricultural Climate (CLAC), A. R. C., Dokki, Egypt.Hanaa A.Abd-ElrahmanDepartment of vegetable research, N. R. C., Dokki, Cairo, Egypt.Fatma S.AboudDepartment of soilless, (CLAC), A. R. C., Dokki, Egypt.Journal Article20230116The application spray of some organic extracts considers a suitable nutrient supplement to the utilization of chemical fertilizers. So, it needs to more study led to obtain the great quantitative and qualitative characteristics of vegetative crops. An experimental study was conducted at the Central Laboratory of Agricultural Climate (CLAC), Agricultural Research Center, Dokki, Egypt. Celery plants were planted into a net house during the two successive winter seasons of 2018/2019 and 2019/2020. This studied the effect of foliar application of poultry manure tea, vermicompost tea, and algae extract on the vegetative growth, productivity, and quality of celery plants.The trial design was a randomized complete blocks design with three replications. Nine treatments of organic extracts as spray were applied using two concentrations (10, 20 ml/l) for (algae extract, poultry manure tea, and vermicompost tea) and with additional 5ml/l molasses for (poultry manure tea and vermicompost tea) compared with control (water spray). A mixture of poultry manure tea at 20 ml/l + 5ml/l molasses recorded the best parameters of vegetative growth, yield, chemical and quality characteristics followed by a mixture of vermicompost tea at 20 ml/l + 5ml/l molasses with no significant differences between them. Conversely, the least parameters of vegetative growth, yield, chemical, and quality characteristics were obtained by spraying water (control) in both seasons.https://jpp.journals.ekb.eg/article_280601_35d0813548e5fcae6680b47dc67b0d57.pdf