Abstract Vitamin-E deficiency is a serious health problem worldwide. In maize, α-tocopherol possessing the highest vitamin-E activity is regulated by vte4 gene. Here, 54 maize inbreds possessing three favourable (0/0, 7/0 and 0/118) and one unfavourable (7/118) haplotypes of vte4 were evaluated at three locations. Significant variation was observed for α-, γ-, δ- and total-tocopherol. Variation in β-tocopherol was narrow. The mean α-tocopherol of 0/0, 7/0 and 0/118 haplotypes was much higher than the unfavourable (7/118) haplotype. Further, 0/0, 0/118 and 7/0 haplotypes possessed higher proportion of α-tocopherol/ total tocopherol than 7/118 haplotype. α-, γ- and δ- tocopherols were positively correlated (r = 0.56, 0.88 and 0.45, respectively) with total tocopherol. Across tocopherols, genotypes explained 34.7–90.4 %, while environment represented 0.3–21.7 % of total variation. β- and δ-tocopherols were minute in concentration, and α- and γ- tocopherols were the predominant fractions. This is the first report on genetic analysis of tocopherols among maize inbreds possessing four haplotypes of vte4 for use in biofortification programs in India.

中文翻译：

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外来和本土玉米自交系中籽粒生育酚的遗传变异性和γ-生育酚甲基转移酶（vte4）基因的单倍型分析

摘要 维生素E缺乏是世界范围内严重的健康问题。在玉米中，维生素E活性最高的α-生育酚受vte4基因调控。在这里，在三个位置评估了 54 个具有 vte4 的三个有利（0/0、7/0 和 0/118）和一个不利（7/118）单倍型的玉米自交系。观察到 α-、γ-、δ- 和总生育酚的显着变化。β-生育酚的变化很小。0/0、7/0 和 0/118 单倍型的平均 α-生育酚远高于不利的 (7/118) 单倍型。此外，0/0、0/118 和 7/0 单倍型比 7/118 单倍型具有更高的 α-生育酚/总生育酚比例。α-、γ- 和 δ- 生育酚与总生育酚呈正相关（分别为 r = 0.56、0.88 和 0.45）。在生育酚中，基因型解释了 34.7-90.4%，而环境占总变异的 0.3-21.7%。β- 和 δ- 生育酚的浓度很小，而 α- 和 γ- 生育酚是主要组分。这是关于具有四种 vte4 单倍型的玉米自交系生育酚遗传分析的第一份报告，用于印度的生物强化计划。