Population Structure Analysis and Genome-Wide Association Study of Tea(Camellia sinensis(L.)Kuntze)Germplasm in Qiannan,China,Based on SLAF-Seq Technology  

作　　者：Fen Zhang Weili Tian Lu Cen Litang Lv Xiaofang Zeng Yulu Chen Yichen Zhao Yan Li 

机构地区：[1]The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education),Institute of Agro-Bioengineering and College of Life Sciences,Guizhou University,Guiyang,550025,China [2]College of Tea Sciences,Guizhou University,Guiyang,550025,China

出　　处：《Phyton-International Journal of Experimental Botany》2022年第4期791-809,共19页国际实验植物学杂志（英文）

基　　金：This work was supported by the Science and Technology Foundation of Guizhou Province[20181044];the Construction Program of Biology First-Class Disciplining Guizhou(GNYL[2017]009);the Young Scholars and Technology Talents Development Project of Guizhou Education Department KY(2018)124,and the Independent Subject Grant Open Project of the Key Laboratory of Mountain Plant Resources Conservation and Plantation Innovation of the Ministry of Education(Guizhou University).

摘　　要：Duyun Maojian tea is a famous tea in China.In this study,the specific-locus amplified fragment(SLAF)sequencing method was used to analyze the population structure and conduct a genome-wide association study(GWAS)of 2 leaf traits of 123 tea plants in Qiannan,China.A total of 462,019 SLAF tags and 11,362,041 single-nucleotide polymorphism(SNP)loci were obtained.The results of phylogenetic tree analysis,cluster analysis,and principal component analysis showed that 123 tea germplasms were clustered into three groups,and the heterozygosity rates for Groups I,II,and II were 0.206,0.224,and 0.34,respectively.Generally,tea germplasms in a production area are clustered in a group,indicating that tea germplasms in different production areas have certain genetic diversity.The traditional Duyun Maojian tea core production areas,TS and DC-SJ,are clustered into Group I and Group II respectively,while the ZY production area is relatively independent in Group III.Furthermore,based on GWAS analysis,11 candidate genes related to leaf apex and 7 candidate genes related to leaf shape were obtained.This study clarified the genetic relationship among eight Duyun Maojian tea production areas and obtained candidate genes related to leaf apex and leaf shape development.The results showed that population structure and candidate genes are an effective basis for the breeding of Duyun Maojian tea germplasm.

关 键 词：Duyun maojian tea plant SLAF-seq SNP genetic structure leaf character GWAS 

分 类 号：Q94[生物学—植物学]