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

被引：9

作者：

Liu, Shuang ^{[1
]}

Wang, Feng ^{[2
]}

Gao, Li Jun ^{[3
]}

Li, Jin Hua ^{[2
]}

Li, Rong Bai ^{[3
]}

Gao, Han Liang ^{[3
]}

Deng, Guo Fu ^{[3
]}

Yang, Jin Shui ^{[1
]}

Luo, Xiao Jin ^{[1
]}

机构：

[1] Fudan Univ, Inst Genet, Sch Life Sci, State Key Lab Genet Engn, Shanghai 200433, Peoples R China

[2] Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Guangdong, Peoples R China

[3] Guangxi Acad Agr Sci, Nanning 530007, Guangxi, Peoples R China

来源：

BREEDING SCIENCE | 2012年 / 62卷 / 04期

基金：

中国国家自然科学基金;

关键词：

rice (Oryza sativa L.); heading date; fine mapping; complementary genes; gene interaction; QUANTITATIVE TRAIT LOCI; BACKCROSS INBRED LINES; PLANT HEIGHT; EPISTATIC INTERACTIONS; FLOWERING TIME; PHOTOPERIOD SENSITIVITY; NATURAL VARIATION; QTL ANALYSIS; DATE; IDENTIFICATION;

D O I：

10.1270/jsbbs.62.310

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

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.

引用

页码：310 / 319

页数：10

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