Epistasis and genotype-by-environment interaction of grain protein content in durum wheat
Genet. mol. biol
;
33(1): 125-130, 2010. tab
Article
in English
| LILACS
| ID: lil-566136
ABSTRACT
Parental, F1, F2, BC1 and BC2 generations of four crosses involving four cultivars of durum wheat (Triticum durum Desf.) were evaluated at two sites in Tunisia. A three-parameter model was found inadequate for all cases except crosses Chili x Cocorit 71 at site Sidi Thabet and Inrat 69 x Karim at both sites. In most cases a digenic epistatic model was sufficient to explain variation in generation means. Dominance effects (h) and additive x additive epistasis (i) (when significant) were more important than additive (d) effects and other epistatic components. Considering the genotype-by-environment interaction, the non-interactive model (m, d, h, e) was found adequate. Additive variance was higher than environmental variance in three crosses at both sites. The estimated values of narrow-sense heritability were dependent upon the cross and the sites and were 0 percent-85 percent. The results indicate that appropriate choice of environment and selection in later generations would increase grain protein content in durum wheat.
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Index:
LILACS (Americas)
Language:
English
Journal:
Genet. mol. biol
Journal subject:
Genetics
Year:
2010
Type:
Article
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