Genetic analysis and fine mapping of a lax mutant in rice

文献类型： 外文期刊

第一作者： Wang, Y

作者： Wang, Y;Xiao, H;Qian, Q;Li, HC;Li, SG;Zhu, LH

作者机构：

关键词： rice;lax;microsalellite marker;CAPS marker;gene mapping

期刊名称：CHINESE SCIENCE BULLETIN （ 影响因子：1.649； 五年影响因子：1.738 ）

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收录情况： SCI

摘要： We have analyzed a lax mutant that exhibits altered panicle architecture in rice. The primary and secondary rachis-branches are normally initiated and each branch ends in a terminal spikelet, but all the lateral spikelets are absent and the terminalspikelet displays variegated structures in the mutant. An F_2 population from the cross between the lax mutant and a japonica variety, W11, was constructed and analyzed. Using microsatellite and CAPS markers, the lax locus was mapped on the long arm of chromosome 1, co-segregated with a CAPS marker, LZ1, within an interval of 0.28 cM between a CAPS marker, HB2, and a microsatellite marker, MRG4389. RT-PCR analysis revealed that the expressions of the rice B-function MADS-box genes OsMADS2, OsMADS4, OsMADS16 and OsMADS3 were significantly reduced, whereas the expression of the rice A-function gene RAP1A was not altered.

分类号： N1

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