宁夏水稻品种抗稻瘟病基因Pi-ta、Pi-b和Pi9的检测分析

发布时间：2017-12-27 01:13

本文关键词：宁夏水稻品种抗稻瘟病基因Pi-ta、Pi-b和Pi9的检测分析　出处：《江苏农业科学》2016年09期 　论文类型：期刊论文

【摘要】：为明确宁夏水稻品种中抗稻瘟病基因Pi-ta、Pi-b和Pi9的分布情况,为宁夏水稻抗穗颈瘟病的分子标记辅助选择育种奠定基础。利用Pi-ta、Pi-b和Pi9 3个与抗稻瘟病基因紧密连锁的功能标记,对94份宁夏水稻品种进行抗稻瘟病基因的分子检测。结果表明,宁夏水稻品种中含Pi-ta抗性基因的占46.8%,含Pi-b抗性基因的占93.6%,含Pi9抗性基因的占27.7%,同时含有Pi-ta和Pi-b抗性基因的占44.7%,同时含有Pi-ta、Pi-b和Pi9抗性基因的占12.8%。根据报道,Pi-ta、Pi-b基因的联合效应与穗颈瘟抗性正相关系数为0.71,表明从宁夏水稻品种中选育抗穗颈瘟品种是有基因基础的。
[Abstract]:In order to clarify the distribution of blast resistance genes Pi-ta, Pi-b and Pi9 in Ningxia rice varieties, we lay the foundation for marker assisted selection of rice blast resistance in Ningxia. The molecular detection of blast resistance genes in 94 Ningxia rice varieties was carried out by 3 functional markers linked with Pi-ta, Pi-b and Pi9. The results showed that Ningxia rice varieties contained 46.8% of Pi-ta resistance genes, 93.6% of them contained Pi-b resistance genes, 27.7% of them contained Pi9 resistance genes, and 44.7% of them contained Pi-ta and Pi-b resistance genes, accounting for 12.8% of Pi-ta, Pi-b and Pi9 resistance genes. According to the reports, the positive correlation coefficient between Pi-ta and Pi-b gene and Panicle Blast Resistance is 0.71, which indicates that there is a genetic basis for breeding varieties resistant to Panicle Blast in Ningxia rice varieties.
【作者单位】：宁夏大学农学院;
【基金】：宁夏高校项目(编号:NGY2014058) 宁夏水稻育种专项(编号:2013NYYZ0302) 国家自然科学基金(编号:31360324)
【分类号】：S435.111.41
【正文快照】： 水稻(Oryza sativa)是世界上最重要的粮食作物之一,其产生的稻谷是全球半数以上人口的主食。由稻瘟病菌(Magnaporthe oryzae;无性态:Pyriculariagrisea)引起的稻瘟病是水稻生产的主要病害之一[1],严重威胁世界的粮食安全[2-3]。实践证明,利用抗稻瘟病基因培育抗性品种是防治水

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