Combining ability in some genotypes of bread wheat (Triticum aestivum L.) under different sowing dates
Ali, M., Hassan, M., Ali, I. (2020). Combining ability in some genotypes of bread wheat (Triticum aestivum L.) under different sowing dates. EKB Journal Management System, 2(2), 291-305. doi: 10.21608/svuijas.2020.42033.1036
M.A. Ali; M.S. Hassan; I.A. Ali. "Combining ability in some genotypes of bread wheat (Triticum aestivum L.) under different sowing dates". EKB Journal Management System, 2, 2, 2020, 291-305. doi: 10.21608/svuijas.2020.42033.1036
Ali, M., Hassan, M., Ali, I. (2020). 'Combining ability in some genotypes of bread wheat (Triticum aestivum L.) under different sowing dates', EKB Journal Management System, 2(2), pp. 291-305. doi: 10.21608/svuijas.2020.42033.1036
Ali, M., Hassan, M., Ali, I. Combining ability in some genotypes of bread wheat (Triticum aestivum L.) under different sowing dates. EKB Journal Management System, 2020; 2(2): 291-305. doi: 10.21608/svuijas.2020.42033.1036

Combining ability in some genotypes of bread wheat (Triticum aestivum L.) under different sowing dates

SVU-International Journal of Agricultural Sciences
Article 20, Volume 2, Issue 2, July 2020, Page 291-305  XML PDF (475.35 K)
Document Type: Original Article
DOI: 10.21608/svuijas.2020.42033.1036
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Authors
M.A. Aliorcid 1; M.S. Hassan email orcid 1; I.A. Ali2
1Department of Agronomy, Faculty of Agriculture, South Valley University, Qena, Egypt.
2Qena Directorate of Agriculture, Qena, Egypt
Abstract
Sixty four genotypes (28 F1,s, 28 F2-populations and their  8 parents) were evaluated for days to heading, plant height, 100-grain weight and grain yield/plant under two sowing dates (Nov., 22nd , normal sowing date and Dec., 30th, late sowing date) in 2017/2018 growing season at the Exp. Farm of South Valley Uni., Qena, Egypt. The differences among parents, F1,s, F2-populations andparents vs crosses were highly significant at both planting dates for all studied traits. Delaying sowing date reduced performance all studied traits. The parents; P3, P4, P6 and P8 and the crosses; P1 × P3, P1 × P6, P1 × P8, P2 × P3, P2 × P5, and P3 × P8 displayed HSI and S less than one and they were relatively heat tolerant and less sensitive to heat of F1 and F2-generations. Highly significant differences due to general (GCA) and specific (SCA) combining abilities were detected for all studied traits. The ratio of GCA to SCA was less than one for all studied traits, indicating that the major effect in the control of these traits was by non-additive gene action, except plant height. The parent P3 was considered as the best combiner for heading, plant height and grain weight, but the parent P2 was considered as the best combiner of F1,s and F2-generations for 100-grain weight and grain yield/plant under both dates. The cross P2 × P8 could be considered as the best combination of F1,s and F2-generations for all studied traits under both planting dates.
Keywords
Bread wheat; Combining ability; Sowing dates
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