Origins of weedy rice revealed by polymorphisms of chloroplast DNA sequences and nuclear microsatellites  

作　　者：Nan Yao Zhe Wang Zhuo-Jun Song Lei Wang Yong-Sheng Liu Ying Bao Bao-Rong Lu 

机构地区：[1]Ministry of Education Key Laboratory for Biodiversity and Ecological Engineering,Department of Ecology and Evolutionary Biology,Fudan University,Shanghai 200438,China [2]School of Horticulture,Anhui Agricultural University,Hefei 230036,China [3]School of Life Sciences,Qufu Normal University,Qufu 273165,Shandong,China [4]Translational Medical Center for Stem Cell Therapy and Institute for Regenerative Medicine,Shanghai East Hospital,Shanghai Key Laboratory of Signaling and Disease Research,School of Life Sciences and Technology,Tongji University,Shanghai 200029,China

出　　处：《Journal of Systematics and Evolution》2021年第2期316-325,共10页植物分类学报（英文版）

基　　金：This work was funded by the National Natural Science Foundation of China(31330014,31271683).

摘　　要：Conspecific weeds that permanently infest worldwide agroecosystems are evolved from their crop species.These weeds cause substantial problems for crop production by competing for resources in agricultural fields.Weedy rice represents such a conspecific weed infesting rice ecosystems,and causing tremendous rice yield losses owing to its strong competitiveness and abundant genetic diversity,likely resulted from its complex origins.Here,we report the use of chloroplast DNA(cpDNA)fingerprints to determine whether weedy rice is evolved from its wild(exo-feral)or cultivated(endo-feral)rice progenitor as the maternal donor in recent hybridization events.In addition,we also applied nuclear simple sequence repeat(SSR)markers to confirm the exo-feral or endo-feral origins of weedy rice accessions determined by the cpDNA fingerprints.We found that the studied weedy rice accessions evolved either from their wild or cultivated rice progenitor,as the maternal donor,based on the cpDNA network and structure analyses.Combined analyses of cpDNA and nuclear SSR markers indicated that a much greater proportion of weedy rice accessions had the endo-feral origin.In addition,results from the genetic structure of nuclear SSR markers indicated that weedy rice accessions from the endo-feral pathway are distinctly associated with either indica or japonica rice cultivars,suggesting their complex origins through crop-weed introgression.The complex pathways of origin and evolution could greatly promote genetic diversity of weedy rice.Therefore,innovative methods should be developed for effective weedy rice control.

关 键 词：genetic structure molecular markers networking analysis Oryza sativa f.spontanea weed evolution wild relatives 

分 类 号：S511[农业科学—作物学]