Generation means analysis of physiological and agronomical targeted traits in durum wheat (Triticum durum Desf.) cross

Revista Facultad Nacional de Agronomía Medellín

Abdelkader Benbelkacem¹  Amar Benmahammed²  Hamenna Bouzerzour²  Abdelmalek Oulmi²  Laid Benderradji³  Zine El Abidine Fellahi⁴  Manel Salmi⁵ 

[1] Algerian National Institute of Agronomic Research (INRAA) - Research Unit of Constantine;University of Ferhat Abbas - Faculty of Life and Natural Sciences - Ecology and Plant Biology Department;University of Mohamed Boudiaf - Faculty of Sciences;University of Mohamed El Bachir El Ibrahimi - Faculty of Life and Natural Sciences and Earth Sciences and the Universe;University of Mostefa Ben Boulaid - Faculty of Life and Natural Sciences - Ecology and Environment Department;

关键词: generation means analysis;    genotypic correlation;    heritability;    non-allelic interaction;    physio-agronomical traits;    Triticum durum;   

DOI  :  10.15446/rfnam.v72n3.77410

来源: DOAJ

【 摘 要 】

Genetic parameters such as leaf relative water content, leaf chlorophyll content, plant height, above-ground biomass, harvest index, grain yield, and grain yield components of Bousselam/Mrb5 durum wheat (Triticum durum Desf.) cross were estimated based on generation means analysis. A, B, C, and D scaling and Chi-square (χ2) tests revealed the inadequacy of the simple additive-dominance model. This result suggests the presence of digenic epistasis for most studied traits; the duplicate epistasis was present for relative water content, above-ground biomass, and grain yield; and complementary epistasis was observed for chlorophyll content. Significant genotypic correlation coefficients appeared among grain yield, relative water content, and above-ground biomass. This suggests useful indirect selection criteria to improve simultaneously these traits, which showed significant heritability. It can be concluded that the traits investigated show a complex genetic behavior, which implies that early selection would be less efficient; therefore, it is recommended delaying the selection to advanced generations to benefit from the reduction of non-fixable genetic variation and exploit transgressive segregators due to the significant interaction additivity×additivity (i) of the gene and duplicated epistasis.

【 授权许可】

Unknown