Fine mapping and candidate gene analysis of hwh1 and hwh2, a set of complementary genes controlling hybrid breakdown in rice
文献类型: 外文期刊
第一作者: Jiang, Wenzhu
作者: Jiang, Wenzhu;Chu, Sang-Ho;Piao, Rihua;Lee, Joohyun;Qiao, Yongli;Koh, Hee-Jong;Jiang, Wenzhu;Chu, Sang-Ho;Piao, Rihua;Lee, Joohyun;Qiao, Yongli;Koh, Hee-Jong;Chin, Joong-Hyoun;Jin, Yong-Mei;Jin, Yong-Mei;Han, Longzhi;Piao, Zongze
作者机构:
关键词: rice;hybrid breakdown;fine mapping;complementary gene interaction;ORYZA-SATIVA L.;GMC OXIDOREDUCTASES;RECESSIVE GENES;DROSOPHILA;STERILITY;PLANTS;CROSS;INCOMPATIBILITY;IDENTIFICATION;POPULATIONS
期刊名称:THEORETICAL AND APPLIED GENETICS ( 影响因子:5.699; 五年影响因子:5.565 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Hybrid breakdown (HB), a phenomenon of reduced viability or fertility accompanied with retarded growth in hybrid progenies, often arises in the offspring of intersubspecific hybrids between indica and japonica in rice. We detected HB plants in F-8 recombinant inbred lines derived from the cross between an indica variety, Milyang 23, and a japonica variety, Tong 88-7. HB plants showed retarded growth, with fewer tillers and spikelets. Genetic analysis revealed that HB was controlled by the complementary action of two recessive genes, hwh1 and hwh2, originating from each of both parents, which were fine-mapped on the short arm of chromosome 2 and on the near centromere region of the long arm of chromosome 11, respectively. A comparison of the sequences of candidate genes among both parents and HB plants revealed that hwh1 encoded a putative glucose-methanol-choline oxidoreductase with one amino acid change compared to Hwh1 and that hwh2 probably encoded a putative hexose transporter with a six amino acid insertion compared to Hwh2. Investigation of the distribution of these alleles among 54 japonica and indica cultivars using candidate gene-based markers suggested that the two loci might be involved in developing reproductive barriers between two subspecies.
分类号: Q3
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