Mapping and characterization of a tiller-spreading mutant lazy-2 in rice

文献类型： 外文期刊

第一作者： Li, PJ

作者： Li, PJ;Zeng, DL;Liu, XF;Xu, D;Gu, D;Li, JY;Qian, Q

作者机构：

关键词： Oryza saliva L.;tiller angle;tiller-spreading mutant la-2;fine mapping

期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Tiller angle of rice is an important agronomic trait that contributes to breed new varieties with ideal architecture. In this study, we report mapping and characterization of a rice mutant defective in tiller angle. At the seedling stage, the newly developed tillers of the mutant plants grow with a large angle that leads to a "lazy" phenotype at the mature stage. Genetic analysis indicates that this tiller-spreading phenotype is controlled by one recessive gene that is allelic to a reported mutant la. Therefore, the mutant was named la-2 and la renamed la-1. To map and clone LA, we constructed a large mapping population. Genetic linkage analysis showed that the LA gene is located between 2 SSR markers RM202 and RM229. By using the 6 newly-developed molecular markers, the LA gene was placed within a 0.4 cM interval on chromosome 11, allowing us to clone LA and study the mechanism that controls rice tiller angle at the molecular level.

分类号： N1

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