水稻穗部性状的QTL定位及上位性分析  

QTL Mapping and Epistasis Analysis for Panicle Traits in Rice(Oryza sativa)

作　　者：韩保林[1] 顾朝剑 张洪凯[1] 廖泳祥[1] 彭永彬[1] 张红宇[1] 徐培洲[1] 陈晓琼[1] 吴先军[1] 

机构地区：[1]四川农业大学水稻研究所西南作物基因资源与遗传改良教育部重点实验室,成都611130

出　　处：《分子植物育种》2017年第6期2218-2227,共10页Molecular Plant Breeding

基　　金：国家重点研发计划(2016YFD0100406);公益性行业(农业)科研专项(201403002-3)共同资助

摘　　要：水稻穗部性状与产量直接相关,定位克隆穗部性状相关QTL对探究穗部性状分子机制及分子植物育种具有重要意义。以粳稻TY319和籼稻保持系8B的F3群体为作图群体,对穗长、一次枝梗数、二次枝梗数、每穗总粒数和着粒密度进QTL定位与上位性分析。采用完备区间作图,共检测出14个穗部相关性状QTL,分别位于第1、第2、第7、第8、第9、第10染色体,LOD值介于2.56~4.96,表型变异贡献率介于6.90%~31.99%。控制二次枝梗数的qSB-1、及控制着粒密度的qSD-1和qSD-2未见报道,可能是新的QTL,上位性分析检测到69个互作。Rice yie ld is closely related to panicle traits. Mapping the QTLs governing panicle traits has an important effect on the molecular mechanism and molecular assistant selection（MAS） in breeding. A F3 population including 121 plants derived from the cross of TY319 and 8B were used to detect the QTLs controlling panicle length, number of primary branches, number of secondary branches, spikelets per panicle and analyze effect of epistasis. A total of 14 QTLs controlling panicle traits were detected on chromosomes 1, 2, 7, 8, 9 and 10. The LOD varies from 2.56 to 4.96, and the PVE varies from 6.90% to 31.99%, 11 of mapped QTLs have been reported previously. q SB-1, q SD-1 and q SD-2 were firstly reported. Besides, 69 pairs epistatic effects were detected.

关 键 词：水稻 穗部性状 QTL 上位性 

分 类 号：S511[农业科学—作物学]