Gene Action for Quantitative Traits through Generation Mean Analysis in Indian Mustard (Brassica juncea L.)

Generation means analysis of seed yield and its components in canola

“…Moreover, the strong of significance in heterosis and heterobeltiosis for all studied traits in the corresponding crosses at both locations could be due to the major magnitude of the non-additive gene action. These results are in agreement with Elnenny and Shafei Wafaa (2017), , Philanim et al (2019) and Abdelsatar et al (2020). The recommended heterosis effects estimated for the all studied traits indicated the importance of corresponding crosses in canola breeding programs for improving seeds weight per plant and its main components.…”

“…This is a logical result, since the amount of heterosis and heterobeltiosis (heterozygousity) in F1 may be followed by a valuable reduction in F2 performance in the corresponding crosses for all studied traits at both locations caused could be due to inbreeding. The obtained results were in harmony with those obtained by Elnenny and Shafei Wafaa (2017), and Philanim et al (2019) and Abdelsatar et al (2020). Contradiction between significant heterosis or heterobeltiosis and insignificant inbreeding depression estimates for plant height in the corresponding crosses at Al-Arish and seeds weight per plant in the 1 st cross at Kafr-El-Hamam could be due to the presence of linkage between genes in these materials (Van der Veen, 1959).…”

“…Thus, selection of these traits must be delayed to advanced generations to benefit from the reduction of non-fixable genetic variation and exploit transgressive segregants. These results are in harmony with those obtained by Elnenny and Shafei Wafaa (2017), , Philanim et al (2019) and Abdelsatar et al (2020) they indicated that importance of epistasis in controlling all traits under study. This indicated that the magnitudes of non-fixable gene action types (epistatic) were larger than the additive or dominance gene effects in the performance of corresponding crosses for most studied traits may suggest the improvement of most traits could be achieved through hybrid breeding method.…”

“…This confirmed that there is the large diversity between parental lines in their genetic background. Similar findings were reported by Elnenny and Shafei Wafaa (2017), , Philanim et al (2019) and Abdelsatar et al (2020). Moreover, the strong of significance in heterosis and heterobeltiosis for all studied traits in the corresponding crosses at both locations could be due to the major magnitude of the non-additive gene action.…”

“…Results of indicated the importance of additive and epistatic effects for a number of racemes per plant and number of siliquae per plant, whereas 1000-seed weight was mainly controlled by epistatic effects. Additionally, Philanim et al (2019) showed the predominance of both additive, dominance and their interaction effect for most of yield and its component traits, except for number of primary racemes per plant and number of secondary racemes per plant where the role of main gene effect (additive and dominance) was distinct. Precise information on inheritance of yield and yield-related traits is required for effective breeding and/or selection strategies to improve these traits in canola.…”