%0 Journal Article %A WAN Ying-xiu %A DENG Qi-ming %A WANG Shi-quan %A LIU Ming-wei %A ZHOU Hua-qiang %A LI Ping %T Genetic Polymorphism of Wx Gene and Its Correlation with Major Grain Quality Traits in Rice %D 2006 %R %J Chinese Journal OF Rice Science %P 603-609 %V 20 %N 6 %X An experiment was conducted to analyze the allelic variation of the Wx gene in 50 non-glutinous rice varieties(lines) using molecular markers RM190 [for(CT)n single sequence repeat] and 484/W2R-ACCⅠ(for G/T SNP).A total of seven homozygous(CT)n-type variations,namely(CT)20,(CT)19,(CT)18,(CT)17,(CT)14,(CT)11 and(CT)10,and one heterozygous genotype(CT)11/(CT)18 were detected with RM190,of which(CT)11 and(CT)18 were predominant.Two homozygous(G/G and T/T genotypes) and one heterozygous G/T Wx genotype were detected using 484/W2R-ACCⅠ.Most of the materials with a(CT)11 of RM190 were G/G SNP of 484/W2R-ACCⅠ,while(CT)18 were T/T.The materials tested were grouped into 10 categories using the two markers together.Further analysis indicated that 59.3% variance of amylose content was attributed to the polymorphism of Wx gene resulted from RM190 marker,whereas 56.1% and 24.6% of the variance in amylose content and gel consistency were respectively attributed to the polymorphism of Wx gene resulted from 484/W2RACCⅠmarker.Furthermore,in the presence of SSR and CAPS markers together,72.4% of the variance in amylose content could be explained.The application prospects of the two markers in breeding were also discussed. %U http://www.ricesci.cn/EN/abstract/article_1545.shtml