中文摘要：灰飞虱（SBPH）及其传播的水稻黑条矮缩病毒病（RBSDVD）对水稻生产造成了严重损害。虽然培育抗性品种被认为是RBSDVD管理最重要的策略之一，但迄今为止发现的高抗品种很少。本研究中，作者鉴定了一个对RBSDVD高抗的籼稻品种9194，并分析了这种抗性背后潜在的QTLs。一共鉴定了4个RBSDVD 抗性QTLs，即qRBSDV3、qRBSDV6、qRBSDV9和qRBSDV11。本研究对RBSDVD 和SBPH抗性QTLs的鉴定以及品种单个和多个基因的发展，为抗性水稻品种分子育种提供了新的资源。
外文摘要：Small brown planthopper (SBPH) and its transmitted rice black-streaked dwarf virus disease (RBSDVD) cause serious damage to rice (Oryza sativa L.) production. Though breeding of resistant cultivars is believed to be one of the most important strategies for RBSDVD management, few high-resistance lines have been found to date. In the present study, we identified an indica variety, 9194, that is highly resistant to RBSDVD and analyzed the quantitative trait loci (QTLs) underlying this resistance. In total, four QTLs for RBSDVD resistance, viz. qRBSDV3, qRBSDV6, qRBSDV9, and qRBSDV11, were identified. Among them, qRBSDV6, qRBSDV9, and qRBSDV11 with LOD (logarithm [base 10] of odds) scores of 4.42-4.48, 2.11-7.26, and 5.01-7.16 were repeatedly detected in 2 years, accounting for 10.3-16.7%, 8.3-35.5%, and 20.0-31.1% of the total phenotypic variation, respectively. Further, introgression of single-or multiple-resistance QTLs into a susceptible rice variety by marker-assisted selection (MAS) indicated that stacking the QTLs could progressively enhance RBSDVD resistance, suggesting that these QTLs act additively. The same population was also used for QTL mapping of SBPH resistance. Four QTLs, viz. qSBPH1, qSBPH5, qSBPH8, and qSBPH9, with LOD scores of 2.72, 2.78, 2.15, and 2.85 were detected, explaining 13.7%, 11.0%, 12.0%, and 21.0% of the phenotypic variation, respectively. The identification of RBSDVD and SBPH resistance QTLs, and the development of single and multiple genes with pyramided lines, in this study provides innovative resources for molecular breeding of resistant rice cultivars.
外文关键词：Small brown planthopper (SBPH), Rice black-streaked dwarf virus disease (RBSDVD), Quantitative trait loci (QTLs), Rice (Oryza sativa L.)
作者：Sun, Zhiguang; Liu, Yuqiang; Xiao, Shizhuo; 等
作者单位：南京农业大学
期刊名称：MOLECULAR BREEDING
期刊影响因子：2.57
出版年份：2017
出版刊次：6
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