数字农科院2.0

大白菜抗TuMV显性位点F2的QTL-seq分析

文献类型: 中文期刊

作者: 李国亮;张淑江;钱伟;李菲;章时蕃;张慧;方智远;孙日飞

作者机构:

关键词: 大白菜;TuMV;显性位点;QTL-seq;遗传分析

期刊名称:园艺学报

ISSN: 0513-353X

年卷期: 2019 年 2 期

页码: 307-316

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: 为了挖掘大白菜抗TuMV基因的多样性,制定抗TuMV的遗传改良策略和综合防治措施,对抗TuMV的显性位点进行QTL分析.以大白菜对TuMV高抗的'89B'和高感的'强势'为亲本,构建F2群体.采用人工磨擦接种TuMV法对F2群体进行单株接种鉴定,经卡平方测验F2群体抗、感植株分离比例不符合3︰1(χ2=4.8>χ0.052=3.84),非单基因遗传,为数量位点控制.选取表型高抗和高感的F2单株各40株进行混池,对2个极端池以及2个亲本进行重测序分析.通过计算抗、感池与亲本间的△(SNP-index),获得两个抗TuMV位点区域,物理位置为A07染色体的13.9~14.4 Mb和A08染色体的16.4~17.4 Mb.上述两个区域共筛选出具有多态性位点的基因68个,其中6个基因与植物抗性有关,其编号分别为Bra028499、Bra028500、Bra016311、Bra016312、Bra016313和Bra016314,其中Bra028499和Bra028500编码抗病蛋白,Bra016311、Bra016312、Bra016313和Bra016314编码抗TMV蛋白.Bra028499、Bra028500、Bra016311和Bra016314含有TIR-NBS-LRR特殊结构域.在已定位克隆的植物抗病基因中,大约80%属于NBS基因家族,因此推测这些基因可能与大白菜抗TuMV有关.

分类号: S436.341

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