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Molecular mapping of a pollen killer gene S29(t) in Oryza Glaberrima and co-linear analysis with S22 in O-Glumaepatula

文献类型: 外文期刊

作者: Hu, Fengyi 1 ; Xu, Peng 1 ; Deng, Xianneng 1 ; Zhou, Jiawu 1 ; Li, Jing 1 ; Tao, Dayun 1 ;

作者机构: 1.Yunnan Acad Agr Sci, Food Crops Res Inst, Kunming 650205, Peoples R China

关键词: co-linear;hybrid sterility;pollen killer;Oryza sativa;O. glaberrima;O. glumaepatula

期刊名称:EUPHYTICA ( 影响因子:1.895; 五年影响因子:2.181 )

ISSN: 0014-2336

年卷期: 2006 年 151 卷 3 期

页码:

收录情况: SCI

摘要: Two species in genus Oryza, O. glaberrima and O. glumaepatula, are valuable and potential sources of useful genes of interest for rice improvement. However, the hybrid sterility between O. sativa and these two species is a main reproduction barrier when transferring the favorable traits/genes to mbox{O. sativa.} To overcome it, the nature of hybrid sterility should be understood further. The objective in the report is to map a new hybrid sterility gene as a Mendelian factor from O. glaberrima and analyze the co-linear of hybrid sterility S loci mbox{between} mbox{O. glaberrima} and mbox{O. glumaepatula} via comparative mapping approach. A BC2F2 population, derived from a single semi-sterility plant of BC2F1 of WAB56-104/ WAB450-11-1-2-P41-HB (WAB450-6) //WAB56-104///WAB56-104 was employed to map this pollen killer in O. glaberrima since WAB450-6 is a progeny of interspecific hybrid between O. sativa and O. glaberrima. A new pollen killer locus, S29(t) in O. glaberrima, was identified and mapped to interval between SSR marker RM7033 (1.1 cM) and RM7562 (1.3 cM) on rice chromosome 2. Comparative mapping indicated that S29(t) closely corresponded to S22 which is also a pollen killer gene in O. glumaepatula and is tightly linked with RFLP marker S910 on the short arm of rice chromosome 2. The good co-linear between S29(t) and S22 implied that there might exist common (orthologous) hybrid sterility loci controlled the reproduction barrier among AA genome species of genus Oryza, which will contribute significantly to our understanding of speciation and operation of hybrid sterility between O. sativa and its AA genome relatives.

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