Genotype x Environment Interaction Effects on Heritability and Genetic Advance for Yield and its Componentes of Some Faba Bean Genotypes.

Abstract

This investigation was carried out at Sakha Agriculture Research Station. Kafer El-Sheikh, Egypt during during 2013/14 and 2014/15 seasons to evaluate thirteen faba bean promising lines under early (mid-October) and late (mid-November) sowing dates comparing with three commercial cultivars. Each sowing date was conducted in a separate replicated complete blocks experiment and combined analysis was done over both sowing dates and growing seasons to study the effect of genotype x environment interaction on heritability and genetic advance for seed yield and some related traits. Highly significant mean squares of seasons were detected for all studied traits. Sowing dates and genotypes mean squares were highly significant for all traits tested. Mean squares of sowing date x season interactions were highly significant for chocolate spot reaction, No. of seeds/plant and seed yield /plant. Highly significant mean squares of the interactions between genotypes and seasons were found for chocolate spot, No. of pods and seeds/plant, 100-seed weight and seed yield /plant. The interactions between genotypes and sowing dates were highly significant for maturity date, no. of seeds/plant and seed yield/plant. The highest values of predicted genetic advance were mainly due to high vales of heritability and the latest was coupled with high phenotypic coefficient of variability.

Assessment of Genetic Variability and Direct-Indirect Contribution of Post-Anthesis Traits to the Grain Yield in Bread Wheat (Triticum aestivum) at Different Sowing Dates

“…Heritability of some traits increased and for some traits decrease under late sown which mainly attributed to change in the genetic variation among genotypes in two sowing dates. Change in heritability estimates under different sowing dates showed that selection criteria should be reevaluated for different environmental conditions which are supported by the findings of other researchers working on wheat (Eid 2009;Abou-Zaid et al 2017;Lou et al 2021).…”

“…4). These changes, attributed to the activation of different type of genes and change in the association of linked traits under different sowing dates (Abou-Zaid et al 2017;Agrawal et al 2018;Lou et al 2021). Agrawal et al (2018) showed that direct and indirect effects of phenotypic traits and their association changed under normal and late sown chickpea.…”

“…Likewise, in normal sowing number of tillers were strongly correlated with grain yield (r = 0.38; P < 0.01), while in late sowing association was non-significant. Differences in the association under different sowing dates attributed the genes which changes their expression under different environment (Eid 2009;Abou-Zaid et al 2017;Lou et al 2021).…”