河南小麦新品种的春化基因型鉴定
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Allelic Variation of the Vernalization Genes in Henan New Bread Wheat Cultivars
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    摘要:

    为了了解河南省最新培育小麦品种的春化基因的等位变异状况,本研究利用分子标记技术对河南省新培育的50份冬小麦新品系(种)的春化基因Vrn-A1、Vrn-B1、Vrn-D1和Vrn-B3位点的等位变异组成进行了鉴定和分析。结果表明,所有参试小麦品种的Vrn-B3位点基因均为隐性,48份小麦品种的Vrn-A1和Vrn-B1位点基因为隐性,42份小麦品种的Vrn-D1位点基因为隐性,说明隐性春化基因在河南小麦中占据主导地位。其中,豫农2019、豫农2020、豫农2071、国麦301、平安08-8、百农69、囤麦3698、08漯33等8个小麦品种的Vrn-D1位点基因均为显性的Vrn-D1a类型。小麦品系豫农3052和豫农2053的Vrn-A1和Vrn-B1位点的春化基因均表现为缺失。进一步研究表明,这两份小麦新品系,仍能正常开花,但开花期比对照周麦18晚2天,因此Vrn-A1和Vrn-B1并非小麦开花所需的必需基因。本研究将为黄淮麦区广适、高产小麦新品种的选育和推广提供参考。

    Abstract:

    A total of 50 bread wheat cultivars or advanced lines from Henan were used to identify allelic variation of vernalization response genes at the Vrn-A1, Vrn-B1, Vrn-D1 and Vrn-B3 loci. The results showed that all wheat cultivars surveyed possessed recessive alleles at the Vrn-B3 locus, and 48 cultivars possessed recessive alleles at the Vrn-A1 and Vrn-B1 loci, and 42 cultivars possessed recessive alleles at the Vrn-D1 locus. It suggests that recessive alleles are the most prevalent at the Vrn-A1, Vrn-B1, Vrn-D1 and Vrn-B3 loci in Henan bread wheat cultivars surveyed. Wheat cultivars with dominant vernalization genes at the Vrn-D1 locus included 8 cultivars of Yunong2019, Yunong 2020, Yunong 2071, Guomai 301, Ping’an 08-8, Bainong 69, Tunmai 3698 and 08 Luo 33. Two new advanced lines Yunong 3052 and Yunong 2053, developed in Henan Agricultural University, showed the deletions of both Vrn-A1 and Vrn-B1 genes. However, these two cultivars still could normally flower in field but they flowered two-days later than Zhoumai 18. It suggests that Vrn-A1 and Vrn-B1 genes are not necessary for bread wheat flowering. This study could provide useful information for screening high-yield and wide-adaptability wheat cultivars in Chinese wheat breeding program.

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张江花,高曼霞,许海霞,等.河南小麦新品种的春化基因型鉴定[J].植物遗传资源学报,2014,15(5):1040-1046.

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  • 收稿日期:2013-12-09
  • 最后修改日期:2013-12-26
  • 录用日期:2014-08-07
  • 在线发布日期: 2014-09-10
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