数字农科院2.0

小麦芒基因定位及其与农艺性状的相关性分析

文献类型: 中文期刊

作者: 李玲;刘盼;张蕾;张浩;贾继增;高丽锋

作者机构:

关键词: 小麦;芒;小麦660K SNP芯片;GWAS;RNA-seq

期刊名称:植物遗传资源学报

ISSN: 1672-1810

年卷期: 2021 年 22.0 卷 1.0 期

页码:

收录情况: 北大核心(2020版) ; CSCD(2020-2021年度) ; 农林核心(2020版) ; 科技核心(2020版)

摘要: 芒是位于植物穗上的针状结构,广泛存在于禾本科作物水稻、小麦、高粱和大麦中,不同作物芒的结构存在差异.小麦中,芒对提高穗光合效率和产量、防鸟、抗虫及抗逆有重要作用.前人已经对抑制小麦芒发育的主要基因进行了定位和遗传分析,4个主效基因中仅有B1(Tipped1)基因被克隆.本研究基于人工群体云南3号和偃展1号BC3F6群体(YN3/YZ1)和自然群体,分析了芒与其他农艺性状的关系,发现芒对株高和产量性状有显著影响;用小麦660K SNP芯片扫描YN3/YZ1和自然群体,全基因组关联分析(GWAS)显示小麦染色体5AL和6BL存在与芒性状显著相关的基因组区域,分别对应于小麦芒抑制基因B1和B2;长芒和顶芒近等基因系转录组分析发现,在6BL候选区间内有23个差异表达基因.本研究将为进一步克隆B2基因提供参考.

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