关键词: 水稻, NBS-LRR, 正选择, 基因转换

Abstract: We performed a genome-wide analysis of positive selection and gene conversion in members of the nucleotide binding site (NBS)-LRR gene family of Oryza sativa L. var. Nipponbare. Analyses were possible for 172 of 457 NBS-LRR genes in the genome, and the analyses uncovered substantial evidence of positive selection and gene conversion. Sites under positive selection were detected and identified for 19 sequence groups representing 89 NBS-LRR genes and approximate 60% of positively selection sites were located in the LRRs region. At least one gene conversion event was detected in 56 NBS-LRR genes. Positively selection sites were identified in 84% of genes which were detected in a gene conversion event. Most of the genes detected in positive selection or gene conversion were resided in gene clusters.

Key words: Rice, NBS-LRR, Positive selection, Gene conversion