Six-Parameter Genetic Analysis for Grain Yield and Related Traits of Three Bread Wheat Crosses
Year: 2026
Type: article
Abstract: The current research focused on assessing the genetic inheritance of yield-associated characteristics in bread wheat through analysis of six populations: two parents (P1 and P2), F1and F2 generation and their two backcrosses (BC1 and BC2) derived from three crosses; C1 (Misr3 × Misr4), C2 (Line2× Misr3) and C3 (Misr 4 × Line 1(. The mean values of F2 were generally lower than those of F1. However, some F2 individuals exceeded the parental limits suggesting the occurrence of transgressive segregation. Scaling tests revealed that many traits were influenced by interactions among genes (epistasis), so simple additive models were inadequate. All investigated characteristics were governed by both additive and non-additive genetic contributions, with dominance effects being more pronounced than additive ones in most instances. Broad-sense heritability estimates were generally elevated, whereas narrow-sense heritability exhibited low to moderate levels. Expected genetic advance were small to moderate across most characteristics. In general, the F1 generation of the third cross (Misr4 × Line1) exhibited the highest mean grain yield and superior component performance.
Source: Journal of Plant Production
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W7134246995