Abstract: 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．

Key words: Shanyou63, quantitative trait loci (QTL), genetic architecture, oversaturated model, variable selection