黄淮麦区地方小麦品种籽粒颜色相关基因Tamyb10-1等位变异检测?
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Molecular Identification of the Tamyb10 gene controlling the grain color in Landrace Wheat Cultivars from Huanghuai Wheat Region
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    摘要:

    Tamyb10-1基因属于MYB家族的一种转录因子,决定着小麦种皮的颜色,同时对穗发芽抗性也具有一定影响。本实验以来自我国黄淮麦区的地方小麦品种为材料,利用功能标记对参试小麦品种Tamyb10-1基因位点在3A、3B和3D染色体上的等位变异类型进行了检测。结果表明,参试材料中上述每一位点均有2种等位变异类型,由此形成了7种基因型组合,分别为Tamyb10-A1a-/Tamyb10-B1a/Tamyb10-D1a、Tamyb10-A1a/Tamyb10-B1a/Tamyb10-D1b、Tamyb10-A1a/Tamyb10-B1b/Tamyb10-D1a、Tamyb10-A1b/Tamyb10-B1a/Tamyb10-D1a、Tamyb10-A1b/Tamyb10-B1b/Tamyb10-D1a、Tamyb10-A1b/Tamyb10-B1a/Tamyb10-D1b和Tamyb10-A1b/Tamyb10-B1b/Tamyb10-D1b,其分布频率分别为38.0%、15.0%、1.0%、8.0%、1.0%、33.0%和4.0%。进一步研究结果表明,种皮颜色为白色时,Tamyb10-1基因在三个位点均为野生型,而当任何一个位点发生突变时均表现为红色。由于该基因也影响穗发芽的抗性,且籽粒颜色与其抗氧化能力密切相关,因此本研究为以籽粒颜色性状为育种目标的优异种质资源筛选提供了一定参考价值。

    Abstract:

    Tamyb10 genes, a kind of transcription factors of the MYB family, determine the grain color of bread wheat and also have certain influence upon pre-harvest sprouting in bread wheat. In this study, the Tamyb10-1 functional markers reported previously were used to identify allelic variations on the Tamyb10-A1, Tamyb10-B1 and Tamyb10-D1 loci in 100 landrace wheat varietiesfrom Huanghuai Wheat Region. The results indicated that there were two types of alleles on each Tamyb10-1 locus, which resulted in 7 allelic combinations of Tamyb10-1 genes, i.e., Tamyb10-A1a/Tamyb10-B1a/Tamyb10-D1a, Tamyb10-A1a/Tamyb10-B1a/Tamyb10-D1b, Tamyb10-A1a/Tamyb10-B1b/Tamyb10-D1a, Tamyb10-A1b/Tamyb10-B1a/Tamyb10-D1a, Tamyb10-A1b/Tamyb10-B1b/Tamyb10-D1a, Tamyb10-A1b/Tamyb10-B1a/Tamyb10-D1b and Tamyb10-A1b/Tamyb10-B1b/Tamyb10-D1b. Their distribution percentage were 38.0%, 15.0%, 1.0%, 8.0%, 1.0%, 33.0% and 4.0%, respectively. Further analysis suggested that wheat cultivars with wild-type Tamyb10-1 at three loci showed white grains, whereas wheat cultivars with at least one mutant of Tamyb10-1 at three loci showed red grains. In addition, the Tamyb10-1 genes also affect pre-harvest sprouting and grain color is closely related with antioxidant capacity. Therefore, this study could provide certain useful information for the purpose of screening relatively superior wheat germplasms.

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李婷 陈杰,陈锋,崔党群.黄淮麦区地方小麦品种籽粒颜色相关基因Tamyb10-1等位变异检测?[J].植物遗传资源学报,2014,15(5):1089-1095.

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  • 收稿日期:2013-12-08
  • 最后修改日期:2014-01-23
  • 录用日期:2014-08-07
  • 在线发布日期: 2014-09-11
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