Abd-Elnaser, M., Fazaa, M., Saleh, S., Abdelsalam, M., Shawky, M. (2022). Evaluation of Inbred Lines of Maize in a Diallel Cross under Normal Condition and Drought Stress. Arab Universities Journal of Agricultural Sciences, 30(2), 1-14. doi: 10.21608/ajs.2022.133765.1477
Muhammed Abd-Elnaser; Mostafa Fazaa; Samir Saleh; Mohamed Abdelsalam; Mahmoud Shawky. "Evaluation of Inbred Lines of Maize in a Diallel Cross under Normal Condition and Drought Stress". Arab Universities Journal of Agricultural Sciences, 30, 2, 2022, 1-14. doi: 10.21608/ajs.2022.133765.1477
Abd-Elnaser, M., Fazaa, M., Saleh, S., Abdelsalam, M., Shawky, M. (2022). 'Evaluation of Inbred Lines of Maize in a Diallel Cross under Normal Condition and Drought Stress', Arab Universities Journal of Agricultural Sciences, 30(2), pp. 1-14. doi: 10.21608/ajs.2022.133765.1477
Abd-Elnaser, M., Fazaa, M., Saleh, S., Abdelsalam, M., Shawky, M. Evaluation of Inbred Lines of Maize in a Diallel Cross under Normal Condition and Drought Stress. Arab Universities Journal of Agricultural Sciences, 2022; 30(2): 1-14. doi: 10.21608/ajs.2022.133765.1477
Evaluation of Inbred Lines of Maize in a Diallel Cross under Normal Condition and Drought Stress
1Agronomy Department, Faculty of Agriculture, Ain Shams University, P.O. Box 68, Hadayek Shoubra 11241, Cairo, Egypt
2Genetics Department, Faculty of Agriculture, Ain Shams University, P.O. Box 68, Hadayek Shoubra 11241, Cairo, Egypt
3Field Crops Research Institute, Agricultural Research Center, Giza, Egypt.
Abstract
In this study, we examined eight white inbred lines of maize and their F1 crosses under normal and drought stress conditions to estimate their combining ability for grain yield and associated traits. The results showed significant correlation (mean squares) of irrigation treatment with the studied traits. The effects of parents, crosses, and genotypes were all determined to be highly significant under both irrigation levels. Grain yield and other traits showed significant differences (mean squares) associated with both General combining ability (GCA) and Specific combining ability (SCA) under both irrigation regimes, demonstrating the importance of both additive and nonadditive genetic effects in the expression of performance traits. The parental line (P-86) had positive and highly significant GCA effects, as well as the crosses (P-17×P-96), (P-8×P-96), (P-8×P-171), (P-24×P-86), (P-86×P-96), (P-86×P-171), and (P-96×P-171) which then gave the highest specific combinations under both irrigation regimes for grain yield and some of the associated traits. The highest level of heterosis (heterobeltiosis) for grain yield was obtained in the crosses (P-8×P-96), (P-8×P-137), (P-8×P-171), (P-96×P137), and (P-96×P-171) under both irrigation regimes.
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