水稻柱头外露率QTLs定位及其互作分析  

Analysis of QTLs with Main,Epistasis and G×E Interaction Effects of Stigma Extruding Trait in Rice

作　　者：沈圣泉[1] 庄杰云[2] 包劲松[1] 舒庆尧[1] 夏英武[1] 

机构地区：[1]浙江大学农业与生物技术学院,浙江枕州310029 [2]中国水稻研究所,浙江杭州310006

出　　处：《生物数学学报》2006年第4期610-614,共5页Journal of Biomathematics

基　　金：国家"863"计划分子标记辅助育种重大专项(2001AA211081);国家"863"超级稻和分子育种重大专项(2002AA2070002);浙江省重点项目("0406"计划)(2004C12012-1)

摘　　要：以协青早B/密阳46所构建的RIL群体及其相应分子遗传图谱,设置海南和杭州两地遗传试验,应用基于混合线性模型检测QTL主效应、上位性效应和G×E互作效应的遗传分析方法,对水稻柱头外露率(%)进行QTL联合分析．结果表明,该性状明显表现出海南较高(21．83%)而杭州较低(8．35%)的趋势．试验检测到1个主效应QTL(qSE6-1),其LOD值高达28．16,对性状表型的贡献率为14．14%,增效等位基因来自于母本,加性效应为5．10%,不存在显著的GE互作．试验还检测到3对显著的加性×加性双基因互作,上位性互作性效应和贡献率相对较小,且与环境不存在显著的互作．The recombinant inbred line （RIL） populations derived from Xieqingzao B/Miyang 46 and their genetic linkage maps were employed to map the quantitative trait loci （QTL） with main effects, epistasis, and G×E （GE） interaction effects of stigma extruding trait in two environments, Hainan and Hangzhou. The stigma extruding rate was higher in Hainan （21.83%） than that in Hangzhou （8.35%）. Only one QTL with main effect was detected with LOD as high as 28.16, which explained 14.14% of the total phenotypic variations. The positive additive effect of this QTL was 5.10% which came from the female parent. No GE interaction effect was detected. Three additivexadditive double QTL epistasis effects were detected with little contributions, and no epistasis by environment effects was detected.

关 键 词：水稻 RIL群体 QTL定位 上位性效应 G×E互作效应 柱头外露率 

分 类 号：S511[农业科学—作物学]