Characterization of Epistatic Interaction of QTLs LH8 and EH3 Controlling Heading Date in Rice

被引：52

作者：

Chen, Jingbin ^{[1
,2
]}

Li, Xiaoyan ^{[1
,3
]}

Cheng, Cheng ^{[1
]}

Wang, Yahuan ^{[1
]}

Qin, Mao ^{[1
]}

Zhu, Haitao ^{[1
]}

Zeng, Ruizhen ^{[1
]}

Fu, Xuelin ^{[1
]}

Liu, Ziqiang ^{[1
]}

Zhang, Guiquan ^{[1
]}

机构：

[1] South China Agr Univ, Coll Agr, Guangdong Key Lab Plant Mol Breeding, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Guangdong, Peoples R China

[2] Jiangsu Acad Agr Sci, Inst Vegetable Crops, Nanjing 210014, Jiangsu, Peoples R China

[3] Northwest Agr & Forestry Univ, Coll Agron, Yangling 712100, Peoples R China

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

QUANTITATIVE TRAIT LOCI; CCAAT-BINDING-FACTOR; FLOWERING-TIME; TRANSCRIPTION FACTOR; PLANT HEIGHT; GENE; PHOTOPERIOD; EXPRESSION; REGULATOR; COMPLEX;

D O I：

10.1038/srep04263

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Heading date is a critical trait for adaptation of rice to different cultivation areas and cropping seasons. We evaluated the heading dates of 1,123 chromosome segments substitution lines (CSSLs) in the genetic background of an elite rice variety Huajingxian74 (HJX74). A CSSL with the substituted segments from Zihui100 exhibited late heading under both natural long-day (NLD) and natural short-day (NSD) conditions, and the late heading phenotype was controlled by two novel epistatic loci on chromosome 8 and chromosome 3, respectively, termed LH8 and EH3. The function of EH3 was dependent on the LH8 genotype through epistatic interaction between EH3(Zihui100) and LH8(Zihui100) alleles. Genetic and molecular characterization revealed LH8 encodes a CCAAT-box-binding transcription factor with Heading date1 (Hd1)-binding activity and may delay flowering by repressing the expression of Early heading date1 (Ehd1). Our work provides a solid foundation for further study on gene interaction in heading date and has application in breeding rice with greater adaptability.

引用

页数：9

共 49 条

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