%D 2002 %0 ARTICLE %T Analysis on additive effects and additive-by-additive epistatic effects of QTLs for yield traits in a recombinant inbred line population of rice . %J %V 105 ( 8 ) %P 1137-1145 %A Zhuang JY %A Fan YY %A Rao ZM %A Wu JL %A Xia YW %A Zheng KL %M pub12582891 %X A linkage map consisting of 158 DNA markers were constructed by using a recombinant inbred line ( RIL ) population derived from the indica-indica rice cross Zhenshan 97B x Milyang 46 . Quantitative trait loci ( QTLs ) conditioning grain yield and five yield component traits were determined at the one-locus and two-locus levels , and genotype-by-environment ( GE ) interactions were analyzed . Thirty-one QTLs were detected to have significant additive effects for yield traits , of which 12 also exhibited significant epistatic effects . Sixteen significant additive-by-additive ( AA ) interactions were detected , of which nine occurred between QTLs with own additive effects ( M ( ep ) QTLs ) , four occurred between QTLs showing epistatic effects only ( epQTLs ) , and three occurred between M ( ep ) QTLs and epQTLs . Significant GE interactions were found for six QTLs with additive effects and one AA interaction . Generally , the contributions to the phenotypic variation were higher due to QTL main effects than to epistatic effects . The detection of additive effects and AA effects of a QTL interfered with each other , indicating that the detection of QTLs with main effects , as well as the magnitude and directions of the additive effects , might vary depending on their interactions with other loci .