小麦中与低脱氧雪腐镰刀菌烯醇含量关联的抗性基因类似物

被引:2
作者
李荣华 [1 ]
郭培国 [1 ]
Guihau Bai [2 ]
机构
[1] 广州大学生命科学学院
[2] Genotyping Center USDA-ARS,Kansas State University,Manhattan, KS, USA
关键词
小麦; 脱氧雪腐镰刀菌烯醇(DON); 抗性基因类似物(RGA); 数量特性位点(QTL);
D O I
暂无
中图分类号
S435.121 [病害];
学科分类号
090401 ; 090402 ;
摘要
脱氧雪腐镰刀菌烯醇(Deoxynivalenol,DON)是小麦遭受赤霉病危害后由赤霉病菌———禾谷镰刀菌产生的一种真菌毒素,这种毒素对人类和家畜的健康产生危害,严重地影响小麦的利用价值.种植低DON含量的品种是减少这种毒素危害的有效措施,而分子标记辅助育种技术能加速低DON品种的选育进程.在采用AFLP、SSR分子标记的基础上,进一步利用抗性基因类似物(RGA)对‘宁7840’(低DON含量的品种)和‘Clark’(高DON含量的品种)建立的133个重组自交系进行了DON含量的遗传特性分析.研究结果发现两个DON含量的数量特性位点(QTL),它们中含有4个与低DON含量密切相关RGAs,其中三个RGAs(RGA14-1,RGA16-1,RGA18-1)座落在染色体1A的长臂上,另一个(RGA14-2)座落在染色体5B的长臂上.座落在1AL和5BL上的QTL分别解释16.81%和7.84%的DON含量变异.DNA序列分析表明这些RGAs均与现已发现的抗性基因同源/类似,它们可能在小麦的低DON含量和赤霉病抗性上扮演着重要的角色.
引用
收藏
页码:45 / 51
页数:7
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