Hamada, M., Aly, R., Zaater, M. (2024). Estimation of Genetic Parameters, Combining Ability and Heterotic Groups of New Yellow Maize Inbred Lines Using Line X Tester Model Across Two Locations. Journal of Agricultural Chemistry and Biotechnology, 15(3), 47-52. doi: 10.21608/jacb.2024.268142.1076
M. S. Hamada; R. S. H. Aly; Manal Mohamed Zaater. "Estimation of Genetic Parameters, Combining Ability and Heterotic Groups of New Yellow Maize Inbred Lines Using Line X Tester Model Across Two Locations". Journal of Agricultural Chemistry and Biotechnology, 15, 3, 2024, 47-52. doi: 10.21608/jacb.2024.268142.1076
Hamada, M., Aly, R., Zaater, M. (2024). 'Estimation of Genetic Parameters, Combining Ability and Heterotic Groups of New Yellow Maize Inbred Lines Using Line X Tester Model Across Two Locations', Journal of Agricultural Chemistry and Biotechnology, 15(3), pp. 47-52. doi: 10.21608/jacb.2024.268142.1076
Hamada, M., Aly, R., Zaater, M. Estimation of Genetic Parameters, Combining Ability and Heterotic Groups of New Yellow Maize Inbred Lines Using Line X Tester Model Across Two Locations. Journal of Agricultural Chemistry and Biotechnology, 2024; 15(3): 47-52. doi: 10.21608/jacb.2024.268142.1076
Estimation of Genetic Parameters, Combining Ability and Heterotic Groups of New Yellow Maize Inbred Lines Using Line X Tester Model Across Two Locations
1Agricultural Biotechnology Department, Faculty of Agriculture, Damietta University, Damietta, Egypt.
2Maize Research Department, Agriculture Research Center, Field Crops Research Institute, Giza, Egypt
3Agricultural biotechnology Department, Faculty of Agriculture, Damietta University, Damietta, Egypt.
Abstract
The Line x Tester model stands as most potent method to estimate (GCA) and (SCA) effects, thereby aiding to select desirable parents and/or crosses. During the 2022 growing season, eleven inbred lines were crossed with three testers. The thirty-three crosses in addition to SC 168 as check hybrid were evaluated (in the 2023 growing season) at Two locations: Private Farms at Damietta and Dakahlia Governorates. Results showed that, the mean squares of genotypes and their partitioning were significant or highly significant for studied traits combined across two locations. Notably, lines L4, L6, and L9 exhibited significantly negative GCA effects, indicating desirable characteristics such as earliness, shorter plant height, and lower ear placement. Conversely, lines L2, L8, L10, and L11 demonstrated positive and significant GCA effects, contributing to increased grain yield. Five crosses showed positive and significant SCA effects for GYP-1 and GY ard fed-1; L3 x T2, L4 x T2, L6 x T1, L11 x T1 and L11 x T2. Heterotic groups using, Heterospecific Grouping Specific and Combining Ability (HSGCA) for grain yield divided the inbred lines into 3 groups according to the 3 testers. On the other side this method cannot categorize the four lines.; L1, L2, L8 and L10. These groups could be used in breeding programs to give breeders a chance to select the best parents to produce the new promising crosses that had high yielding potential.
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