Genetic Effects of Oil and Saturated Fatty Acid on Maize Kernel in Different Environment

doi:10.7668/hbnxb.2014.03.016

Abstract

Abstract: For the issues that genetic mechanisms were complicated for corn kernel quality traits, and maternal genetic variance could not be subdivided using traditional analysis methods, a seed genetic model was used to analyze embryo, endosperm, cytoplasmic and maternal effects and G×E interaction effects of oil and saturated fatty acid content for maize kernel, the results indicated that genetic main effect controlled maize oil content, and embryo additive effect was the most important effect.Embryo additive variance(V_Ao) constituting 88.92% of total genetic variances, the embryo narrow heritability of oil was high, the value was 79.0%.Genetic×environment interaction controlled palmitic acid content, genetic×environment interaction variance(V_GE) constituting 91.13% of total genetic variances, endosperm additive interaction(V_AeE)and maternal additive interaction effects (V_AmE)played an equivalent role for palmitic acid content, their variances percentage to total genetic variances were 47.47% and 41.99% respectively, the differences between maternal interaction heritability(h_GmE²)and endosperm interaction heritability(h_GeE²)were minor, the value was 39.4% and 39.2% respectively.Genetic×environment interaction also controlled stearic acid content, Genetic×environment interaction variance (V_GE) constituting 87.75% of total genetic variances, maternal additive interaction and embryo additive effects played an important role for stearic acid content, maternal interaction heritability(h_GmE²) for stearic acid was 43.7%, and endosperm interaction heritability was 43.5%. Several inbred lines were selected for oil and saturated fatty acid improvement, lines P₈(ZOL-3), P₉(ZOL-4), P₁₀(ZOL-5) were perfect for oil increase, and P₇(ZOL-2), P₁(ZNL-1)for palmitic acid decrease, P₁(ZNL-1), P₂(Zi330), P₅(107₂)for stearic acid decrease.The results provided a theoretical basis for quality oil maize breeding.

Key words: Maize kernel, Oil, Saturated fatty acid, Genetic effects

CLC Number:

S513.03

WANG Yun-mei, GAO Xiang-kuo, FENG Su-fen, YANG Ke-chang, JIANG Lu-hua, ZHAO Zi-xian, LI Li-zheng. Genetic Effects of Oil and Saturated Fatty Acid on Maize Kernel in Different Environment[J]. journal1, 2014, 29(3): 81-89. doi: 10.7668/hbnxb.2014.03.016.

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