基于汕优63重组自交系群体的数量性状遗传剖析

摘要

In this paper, based on a set of 241 recombinant inbred lines ( RIL) derived from Shanyou63, the simulated data of an oversaturated genetic model including 221 main effects and 221 ×(221-1)/2 =24 310 epitasis effects were analyzed by five methods:E-BAYES, Stepwise, PENAL, LASSO and SSVS, respectively.The results of the simulation study indicated that the E-BAYES method provided accurate estimates of both the QTL effects and location with very high statistical power .A total of 73 QTL covering 12 rice chromosomes were found by the method of E-BAYES underlying 10 agronomic traits, which provided a deeper understanding of the genetic architecture of the cross.%以水稻汕优63衍生的241个重组自交系为供试材料，构建包括221个主效应以及两两标记间221×（221-1）/2＝24310个上位性效应在内的超饱和统计遗传模型。分别采用E-BAYES，Stepwise，PENAL， LASSO和SSVS 5种超饱和模型分析方法对该群体进行模拟试验，获得最优的分析方法E-BAYES，并用该方法对该群体的10个农艺性状进行QTL分析，共检测到73个QTL，分布于水稻的12条染色体上，进一步证实该强优势籼型杂交组合的遗传构成。