Combining ability and gene action estimates for some yield attributes in durum wheat (<i>Triticum turgidum L. var. durum)</i>

Abstract

Combining ability and gene action 6 half diallel crosses. Results revealed that ability mean squares were significant for all studied additive and nonadditive components in the predominance of additive gene effects for From the GCA effect, it was observed that combiner for all yield component ombining ability and gene action of a set of durum wheat characters were studied using 6 6 half diallel crosses. Results revealed that general (GCA) and specific (SCA) combining were significant for all studied traits, suggesting the importance of both additive and nonadditive components in the inheritance of these traits. Baker ratio indicate the predominance of additive gene effects for the majority of traits studied except grain yield.it was observed that none of the six parents was yield components. Among the fifteen crosses, Zenati-Bouteille/Flamengo x followed by Waha x Ofanto, Waha x Mexicali 75 and Ofanto x Guemgoum Rkhem the greatest positive SCA effect for grain yield. Days to heading index could be used as an indirect selection criterion for better grain yield.selecting early heading genotypes having high fertile tillers number could improve grain

Combining ability for quantitative traits related to productivity in durum wheat

“…It was reported that in the inheritance of thousand kernels weight the non-additive gene effects play an essential role (Akinci, 2009;Pansuriya et al, 2014), while A. Hannachi et al (2017) andA. Hassan et al (2018) establish inverse.…”

Variation and Relationships among Agronomic Traits in Durum Wheat [Triticum turgidum(L.) Thell. ssp.turgidumconv.durum(Desf.) MacKey] under South Mediterranean Growth Conditions: Stepwise and Path Analyses

“…Hannachi et al [33] reported that both additive and dominance gene actions were implicated in the expression of durum wheat traits, H1 component was larger than D component for days to heading, spike number, kernel per spike, and grain yield and smaller for plant height and thousand kernel weight.…”

“…is indicated the complex inheritance pattern of yield and yield components, suggesting that selection to improve these traits should be conducted on nonsegregating plant material [33]. Results of several research indicated that effective progress could be made through selection of morphological characters to enhance grain yield potential [27,[34][35][36][37].…”

Response to F3 Selection for Grain Yield in Durum Wheat [Triticum turgidum (L.) Thell. ssp. turgidum conv. durum (Desf.) Mac Key] under South Mediterranean Conditions

“…Indirect selection has been shown to be more efficient, less efficient, or equally efficient compared to direct selection when selection was practiced to improve a trait in one environment by selecting the trait in another environment [5]. Efficiency of indirect selection compared to direct selection depends on the heritability of the trait used as selection criterion and on correlation between this trait and the indirectly targeted trait [6,7]. Investigation of association between yield and secondary traits and correlation coefficient partitioning into direct and indirect effects through path analysis are useful to provide a realistic picture of the relationships between dependent and independent variables [8,9,10].…”

“…al. ; ARRB, 21(2):[1][2][3][4][5][6][7][8][9][10][11] 2017; Article no.ARRB.37923Plant height selection differential and response to F3-selection Plant height direct and correlated responses to F3-selection (values of L group of lines expressed as % of the values of H group of lines)…”