COMPARISON OF BREAD WHEAT LINES PERFORMANCE RESULTING FROM EARLY AND LATE SELECTION IN THE F6 AND F7 GENERATION FOR GRAIN YIELD AND ITS ATTRIBUTES.

Abosapraa, Hussein M; Ahmed, Atif Abo-Elwafa; Bakheit, Bahy Ragheb

doi:10.21608/agro.2025.377674.1671

COMPARISON OF BREAD WHEAT LINES PERFORMANCE RESULTING FROM EARLY AND LATE SELECTION IN THE F6 AND F7 GENERATION FOR GRAIN YIELD AND ITS ATTRIBUTES.

Document Type : Original Article

Authors

¹ department of agronomy Faculty of Agriculture and Natural Resources Aswan University

² Agronomy Dept., Faculty of Agriculture, Assiut University, Assiut, Egypt

³ Department of Agronomy, Faculty of Agriculture, Assiut University

10.21608/agro.2025.377674.1671

Abstract

The relative performance for each genotype was accounted and estimates of phenotypic and genotypic coefficients of variation, heritability in the broad sense and correlation coefficients between grain yield and yield attributes. The phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV) for all the traits in both early and late generations. Magnitude of broad sense heritability was high (above 60%) in all 10 lines early and late selection under both F6 and F7 generations and ranged from 65.09% in 10 F6 early lines selection for number of spikes/plant to 97.30% 10 F7 early lines selection for 100-grain weight and 72.80% in 10 F7 late lines selection for grain yield/plant to 98.60% in 10 F6 late lines selection for plant height. A positive correlation was found between grain yield/plant and each of the spike length, biological yield/plant, weight of spikes/ plant, 100- grain weight and harvest index in all 10 lines early and late selection under both F6 and F7 generations. Negative correlated of grain yield were observed with plant height, number of spike/ plant and number of spikelets/ spikes in all 10 lines early and late selection under both F6 and F7 generations. Stepwise regression analysis showed that, weight of spikes/plant, biological yield and harvest index as important traits affecting grain yield in wheat. These characters have to be ranked the first in any breeding program to improve wheat grain yield.

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