Genomic analyses revealed the rich genetic variations and potential targeted genes of selection during domestication from a perennial woody tree to an annual semi-woody crop in castor bean
作者单位：Department of Economic Plants and Biotechnologyand Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of Sciences Germplasm Bank of Wild SpeciesKunming Institute of BotanyChinese Academy of Sciences Biological Sciences and Centre for Underutilised CropsUniversity of Southampton Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of ChinaMinistry of EducationSouthwest Forestry University
会议名称：《中国植物学会第十六次全国会员代表大会暨85周年学术年会》
会议日期：2018年
关 键 词：Castor bean genetic variation domestication woody tree perennialism annualism
摘 要：Relatively little is known about the genetic variation of woody trees during *** bean（Ricinus communis L.,Euphorbiaceae） is an important nonedible annual semi-woody oilseed crop and its seed oils are widely used in *** cultivated castor bean is evolved from its wild progenitors with perennial woody *** castor bean was utilized by human dating back more than 6000 years,its domestication origin,genomic variation and potential targets of selection underlying domestication traits remain ***,we performed a phylogenetic analysis,resulting in that the wild accessions were distinctively separated from the cultivated *** sequencing for three accessions（one each wild,landrace and cultivar） and their genomic analyses showed a large number of genetic variants between wild and cultivated castor bean,and relatively few between cultivars,suggesting that castor bean has undergone a genetic bottleneck during *** genome analysis revealed that many candidate genes of selection and key pathways potentially involved in the transition from a perennial woody tree to annual semi-woody ***,among 16 oil-related genes only three showed evidence of selection and the remainder showed low or zero genetic variation at the population level,suggesting strong purifying selection in both the wild and domesticated gene *** results extend our understanding of the origin,genomic variation and evolution,and woody tree domestication of castor *** genomic variation identified within wild and cultivated castor bean will provide a valuable resource for future gene-trait associations and as tools for castor bean breeding.