简介：Genesarecontinuallybeingcreatedbytheprocessesofgenomeduplication(ohnolog)andgeneduplication(paralog)Whole-genomeduplicationshavebeenfoundtobewidespreadinplantspeciesandplayanimportantroleinplantevolution.Clearlyun-overlappingduplicatedblocksofwhole-genomeduplicationscanbedetectedinthegenomeofsequencedrice(Oryzasativa).Syntenicohnologpairs(ohnologues)ofthewhole-genomeduplicationsinricewereidentifiedbasedontheirsyntenicduplicatelines.Theparalogsofohnologueswerefurtherscannedusingmulti-roundreciprocalBLASTbest-hitsearching(E＜e-14).Theresultsindicatedthatanaverageof0.55sisterparalogscouldbefoundforeveryohnologueinrice.Theseresultssuggestthatsmall-scaleduplications,aswellaswhole-genomeduplications,playasignificantroleinthetwoduplicatedricegenomes.