| 水稻抗纹枯病QTL qSB-11的育种价值及其进一步定位 |
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| 引用本文： | 左示敏,殷跃军,张丽,张亚芳,陈宗祥,潘学彪.水稻抗纹枯病QTL qSB-11的育种价值及其进一步定位[J].中国水稻科学,2007,21(2):136-142. |
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| 作者姓名： | 左示敏 殷跃军 张丽 张亚芳 陈宗祥 潘学彪 |
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| 作者单位： | 扬州大学,植物功能基因组学教育部重点实验室/江苏省作物遗传生理重点实验室,江苏,扬州,225009 |
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| 基金项目： | 国家自然科学基金;长三角联合科技攻关资助项目 |
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| 摘 要： | 在相对感纹枯病品种Lemont的第11染色体上存在1个抗性QTL qSB 11（抗性等位基因为qSB 11Le）。对qSB 11Le的育种效应即挽回产量损失率进行了研究。在纹枯病较轻发生（4级左右）情况下，qSB 11Le基本未表现出明显的育种效应，相反在重发生（8级左右）条件下，qSB 11Le能挽回的产量损失率达到10.71%。利用发展的多态性分子标记及BC4F2代分离群体，qSB 11Le的存在区间被缩小到分子标记Z405与Z286之间，物理距离在1000 kb左右。可以认为，在水稻抗纹枯病分子育种中，qSB 11Le具有较大的育种价值，利用研究发展的多态性标记可以提高qSB 11Le的选择效率。
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| 关 键 词： | 水稻 纹枯病 抗性 数量性状座位 育种价值 |
| 文章编号： | 1001-7216（2007）02-0136-07 |
| 收稿时间： | 2006-11-10 |
| 修稿时间： | 2006-11-102006-11-23 |
Breeding Value and Further Mapping of a QTL qSB-11 Conferring the Rice Sheath Blight Resistance |
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| ZUO Shi-min,YIN Yue-jun,ZHANG Li,ZHANG Ya-fang,CHEN Zong-xiang,PAN Xue-biao.Breeding Value and Further Mapping of a QTL qSB-11 Conferring the Rice Sheath Blight Resistance[J].Chinese Journal of Rice Science,2007,21(2):136-142. |
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| Authors: | ZUO Shi-min YIN Yue-jun ZHANG Li ZHANG Ya-fang CHEN Zong-xiang PAN Xue-biao |
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| Institution: | Key Laboratory of Plant Functional Genomics of Ministry of Education/Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Yangzhou University, Yangzhou 225009, China |
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| Abstract: | The breeding effect of a resistant QTL qSB-11,with a resistant allele(qSB-11Le)for the rice sheath blight located on chromosome 11 of a susceptible variety Lemont,was investigated.Under severe disease conditions,the lines carrying the qSB-11 Le allele could reduce yield loss up to 10.71% compared to those without this allele.However,no significant difference in yield between the two lines was noted when they were disease-free or slightly infected.By using polymorphic markers and BC4F2 segregating population at the region containing qSB-11Le,the interval covering qSB-11Le was reduced to 1000 kb in length between the two molecular markers,Z405 and Z286.Therefore,the qSB-11Le allele was considered to have a considerable potential in breeding for resistance to rice sheath blight.The molecular markers linked to qSB-11Le developed in the study would be useful to incorporate this favorite allele into elite rice lines via marker assisted selection(MAS). |
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| Keywords: | rices sheath blight resistance quantitative trait locus breeding value |
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