Genetic diversity,population structure,and relationships of apricot(Prunus)based on restriction site-associated DNA sequencing

查看全文 作　　者：Wenwen [1]Li;Liqiang [1]Liu;Yanan [1]Wang;Qiuping [2]Zhang;Guoquan [3]Fan;Shikui [3]Zhang;Yatong [3]Wang;Kang [1]Liao

机构地区：[1]College of Horticulture and Forestry,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China;[2]Xiongyue National Germplasm Resources Garden of the Liaoning Institute of Pomology,Xiongyue,Shenyang 115009,China;[3]Luntai National Fruit Germplasm Resources Garden of Xinjiang Academy of Agricultural Sciences,Luntai,Xinjiang 841600,China

出　　处：《Horticulture Research》索引2020年第7卷第1期,共13页

基　　金：supported by the National Key Research and Development Program(grant number 2016YFC0501504);the Xinjiang Uygur Autonomous Region Key Research and Development Program(grant number 2016B01005-1);the Xinjiang Uygur Autonomous Region Horticulture Key Discipline Fund(grant number 2016-10758-3);the Xinjiang Uygur Autonomous Region Graduate Innovation Project(grant number XJ2019G134). 摘　　要：Single-nucleotide polymorphisms(SNPs)are the most abundant form of genomic polymorphisms and are widely used in population genetics research.Here,high-throughput sequencing was used to examine the genome-level diversity,population structure,and relationships of apricot,which are important for germplasm conservation and molecular breeding.Restriction site-associated DNA sequencing(RAD-seq)was adopted to sequence 168 Prunus spp.accessions distributed in five ecological groups,including 74 accessions of cultivated Prunus armeniaca L.and 94 accessions of wild apricots(P.armeniaca L.and Prunus sibirica L.),which generated 417,961 high-quality SNPs.We used cluster,genetic structure,and principal component analyses to examine the genetic diversities and genetic relationships of the 168 accessions.The Dzhungar-Ili ecological group accessions showed the highest genetic diversity in terms of private allele number,observed heterozygosity,and nucleotide diversity.We speculate that the Central Asian ecological group accessions were domesticated from the Dzhungar-Ili ecological group accessions.The population structure and gene flow of the North China and European ecological group accessions suggested a genetic background of P.sibirica.We argue that the two groups should be considered hybrid swarms connected to P.sibirica by continuous and extensive gene flow.P.armeniaca originated in Northwest China(Ili Valley),subsequently spread throughout Central Asia,and eventually spread to Europe.In addition,selective sweep signatures in P.armeniaca during domestication from wild to cultivated apricots,combined with differentially expressed genes,underlie distinct fruit traits,including sugars,aromas,organic acids,and carotenoids.This study provides substantive and valuable genomic resources that will significantly advance apricot improvement and effective utilization. 关键词：PRUNUS CULTIVATED structure

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Genetic diversity,population structure,and relationships of apricot(Prunus)based on restriction site-associated DNA sequencing

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