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Construction and evaluation of introgression lines and fine mapping of ehd8 from Jinghong common wild rice ( Oryza rufipogon )
Author(s) -
Sun Dayun,
Wang Wenxiang,
Xin Xiaoyun,
Cao Liming,
Sun Xuejun,
Hu Zejun,
Jiang Ling,
Dong Shiqing,
Liu Yahui,
Yang Jinshui,
Luo Xiaojin
Publication year - 2019
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12670
Subject(s) - oryza rufipogon , biology , introgression , genetics , oryza sativa , oryza , genetically modified rice , gene , genetic diversity , population , genetically modified crops , transgene , demography , sociology
Heading date is one of the most important traits in rice and regulated by multiple genes. Common wild rice is the ancestor of Asian cultivated rice and harbours abundant genetic diversity. To use wild rice resource in rice breeding, a set of 154 introgression lines (ILs) covering 93% of the genome of Jinghong common wild rice was constructed in the background 'Teqing', using 208 simple sequence repeat markers evenly distributed on 12 chromosomes. Among the ILs, the line JIL64 displayed late heading independent of photoperiod. Genetic analysis using the two F 2 populations crossed ''Teqing'/JIL64 and JIL64/'Teqing' revealed that late flowering was controlled by a recessive gene on chromosome 8 (designated early heading date 8 , ehd8 ), and ehd8 was fine mapped to the 50‐kb region flanked by markers RM22221 and 64Indel4. Sequencing and qRT‐PCR demonstrated that LOC_Os08g01410 and LOC_Os08g01420 were deleted in JIL64 and may be associated with the late heading of Jinghong common wild rice. These findings lay a practical foundation for characterizing ehd8 , and the ILs help to mine genes from Jinghong common wild rice.