Abstract:

To search for the genetic model of high oleic acid mutations in Brassica napus for high oleic acid-breeding, this study used a low oleic acid content line ‘Yang6026’ (P1) and a high oleic acid content mutation line ‘HO05’ (P2) and their crossing Progenies (F1, RF1, B1, RB1, B2, RB2, F2 and RF2) to analyze the quantitative genetic patterns of high oleic acid. The content of oleic acid was measured by gas chromatograph using single seed method. The results show that, the oleic acid content of parents were stable; Inheritance of high oleic acid was controlled by 2 major genes and present additive-dominance genetic model, and additive-major gene effect was distinct. Two reciprocal cross (F1, RF1) of the two parents (P1, P2) revealed that high oleic acid was non-cytoplasmic . Inheritance Heritability in narrow sense (hN2)of high oleic acid was 63.16% which caused by genotype , and 36.84% was caused by environment.