Genetic analysis and fine mapping of LH1 and LH2, a set of complementary genes controlling late heading in rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Yang, Jin Shui

作者： Yang, Jin Shui;Luo, Xiao Jin;Wang, Feng;Li, Jin Hua;Gao, Li Jun;Li, Rong Bai;Gao, Han Liang;Deng, Guo Fu

作者机构：

关键词： rice (Oryza sativa L.);heading date;fine mapping;complementary genes;gene interaction

期刊名称：BREEDING SCIENCE （ 影响因子：2.086； 五年影响因子：2.632 ）

ISSN： 1344-7610

年卷期： 2012 年 62 卷 4 期

页码：

收录情况： SCI

摘要： Heading date in rice (Oryza sativa L.) is a critical agronomic trait with a complex inheritance. To investigate the genetic basis and mechanism of gene interaction in heading date, we conducted genetic analysis on segregation populations derived from crosses among the indica cultivars Bo B, Yuefeng B and Baoxuan 2. A set of dominant complementary genes controlling late heading, designated LH1 and LH2, were detected by molecular marker mapping. Genetic analysis revealed that Baoxuan 2 contains both dominant genes, while Bo B and Yuefeng B each possess either LH1 or LH2. Using larger populations with segregant ratios of 3:1, we fine-mapped LH1 to a 63-kb region near the centromere of chromosome 7 flanked by markers RM5436 and RM8034, and LH2 to a 177-kb region on the short arm of chromosome 8 between flanking markers Inde122468-3 and RM25. Some candidate genes were identified through sequencing of Bo B and Yuefeng B in these target regions. Our work provides a solid foundation for further study on gene interaction in heading date and has application in marker-assisted breeding of photosensitive hybrid rice in China.

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