小麦穗发芽基因等位变异及其区域分布研究
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国家自然科学基金(U1304318);


Molecular Identification and Distribution of Preharvest Sprouting (PHS) Genes in Different Common Wheat Regions of China
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    摘要:

    为了解中国不同麦区小麦种质资源抗穗发芽基因的等位变异与分布特征,利用小麦抗穗发芽相关的Vp1B3和Dorm1标记对7个不同麦区的446份小麦种质资源的等位变异和分布差异进行了检测。结果表明:(1)利用标记Vp1B3检测出Vp1的等位基因共有3种类型,分别为Vp1Bc(与抗穗发芽相关)、Vp1Ba(与感穗发芽相关)、Vp1Bb(与抗穗发芽相关),其频率分别为62.8%、32.9%和4.3%。(2)标记Dorm1在供试材料中共检测出2种特异性条带,分别为468 bp(DormB1a,与感穗发芽相关)和606 bp(DormB1b,与抗穗发芽相关),所占比例分别为98.6%和1.4%。(3)具有DormB1b基因型的种质主要分布在黄淮冬麦区和长江中下游冬麦区,比例分别为5.1%和1.9%;具有(Vp1Bc+Vp1Bb)基因型(组合)的种质在长江中下游冬麦区和西南冬麦区分布最多,比例分别为75.0%和74.1%。(4)通过标记Vp1B3和Dorm1的综合鉴定,共筛选出同时携带Vp1与DormB1位点种质6份,分别是‘陕麦611’、‘郑农19’、‘豫49198’、‘信阳0913’、‘咸阳大穗’与‘徐州8066’,可以作为抗穗发芽育种的参考亲本。

    Abstract:

    In order to understand the allelic variation and distribution of preharvest sprouting (PHS) genes in whet verieties of different regions, we genotyped 446 wheat cultivars from 7 wheat regions by the functional markers Vp1B3 and Dorm1 related to PHS resistance in China. The results indicated that: (1) Vp1 had three allelic variations detected by the marker Vp1B3: Vp1Bc (related to resistant PHS), Vp1Bb (related to resistant PHS) and Vp1Ba (related to susceptible PHS), and their frequencies were 62.8%, 4.3% and 32.9%, respectively. (2) DormB1 had two kinds of specific bands detected by the marker Dorm1:468 bp (genotype of DormB1a, correlated with susceptible PHS) and 606 bp (genotype of DormB1b, correlated with resistant PHS) accounted for 98.6% and 1.4%, respectively. (3) The detection by marker Dorm1 showed wheat germplasms with the genotype of DormB were distributed in Huanghuai winter wheat region (HHWWR) and Yangtze River middlelower reaches winter wheat region (YMWWR), with the ratios of 5.1% and 1.9%, respectively. The results of Vp1B3 indicated that wheat germplasms with (Vp1Bc+Vp1Bb) genotype (combination) were mostly distributed in YMWWR and Southwestern winter wheat region (SWWWR ) with the ratios of 75.0% and 74.1%, respectively. (4) Through the comprehensive identification of Vp1B3 and Dorm1 markers, 6 accessions of Vp1 and DormB1 loci related to resistant PHS were screened out, which were ‘Shanmai 611’, ‘Zhengnong 19’, ‘Yu 49198’, ‘Xinyang 0913’, ‘XianyangDasui’ and ‘Xuzhou 8066’, respectively. These accessions could be used as reference parents for PHS resistance breeding.

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王黎明,李永霞,高华利,等.小麦穗发芽基因等位变异及其区域分布研究[J].西北植物学报,2019,39(1):52-58

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  • 在线发布日期: 2019-02-28
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