Genetic analysis and fine mapping of a semi-dwarf gene in a centromeric region in rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Chen, Mingjiang

作者： Chen, Mingjiang;Zhao, Zhigang;Chen, Liangming;Zhou, Feng;Zhong, Zhengzheng;Jiang, Ling;Wan, Jianmin;Wan, Jianmin

作者机构：

关键词： semi-dwarf;plant architecture;centromere;positional mapping

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

ISSN：

年卷期：

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收录情况： SCI

摘要： Superior plant architecture is a key means of enhancing yield potential in high yielding varieties. A newly identified recessive gene, named sd-c, controls plant height and tiller number. Genetic analysis of an F_2 population from a cross between thesemi-dwarf mutant and japonica cv. Houshengheng showed that the sd-c locus was flanked by SSR markers RM27877 and RM277 on chromosome 12. Thirty nine InDel markers were developed in the region and the sd-c gene was further mapped to a 1 cM centromeric region between InDel markers Cl 1 and C12. These sequenced markers can be used to distinguish wild type and mutants and thus can be used in marker-assisted selection. The sd-c mutant decreases culm length by about 26% and doubles the tiller number withoutchanging seed weight. Until now only sd-1 has been used in indica rice breeding programs. The sd-c mutant seems to have no undesirable pleiotropic effects and is therefore a potential genetic resource for breeding semi-dwarf indica rice cultivars.

分类号： S33

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