基于全基因组SNP分析辣椒亲本间遗传距离与产量性状杂种优势的关系  

Correlation Analysis Between Heterosis of Yield Traits and Genetic DistanceEvaluated by Genome-wide SNP Markers in Pepper

作　　者：王昆 张宝玺[1] 张正海[1] 曹亚从 于海龙[1] 王立浩[1] WANG Kun;ZHANG Bao-xi;ZHANG Zheng-hai;CAO Ya-cong;YU Hai-long;WANG Li-hao(Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing100081,China)

机构地区：[1]中国农业科学院蔬菜花卉研究所,北京100081

出　　处：《中国蔬菜》2020年第4期30-35,共6页China Vegetables

基　　金：国家重点研发专项“七大作物育种”课题(2016YF0101700)。

摘　　要：为探索基于SNP标记的分子遗传距离预测辣椒产量杂种优势的可能,实现辣椒杂种优势早期预测并筛选强优势组合,以12份辣椒自交系为亲本,采用个别分析和分组分析两种方法,开展了全基因组SNP标记为基础的分子遗传距离与产量杂种优势关系的比较。在个别分析中,从12份自交系中随机选取8份自交系,发现遗传距离与产量杂种优势之间存在不规则变化,有62.5%符合遗传距离越远杂种优势越强的规律;在分组分析中,发现随着遗传距离增大,杂种优势值总体呈现上升趋势。说明辣椒亲本间遗传距离越大,获得高产强优势组合的可能性越大,基于SNP标记的遗传距离可用来预测其后代杂种优势。In order to explore the possibility of predicting pepper yield heterosis based on SNP marker molecular genetic distance,and realizing early prediction of pepper heterosis and screening strong heterosis combinations,this paper took 12 pepper inbred lines as parents,and compared the relationship between molecular genetic distance and yield heterosis based on genome-wide SNP markers by 2 methods of individual analysis and grouping analysis.Eight inbred lines from 12 inbred lines were chosen at random in individual analysis.It was found that there were irregular changes between genetic distance and yield heterosis.62.5% of the inbred lines were accorded with the rule of the farther the genetic distance was,the stronger the heterosis was.In grouping analysis,it was found that along with the increase of genetic distance,the heterosis value showed an upward trend on the whole,indicating the bigger the genetic distance between pepper parents,the greater possibility of obtaining high yield and strong heterosis combination.The genetic distance based on SNP markers could be used to predict the heterosis of their o ffspring.

关 键 词：辣椒 杂种优势 遗传距离 SNP标记 产量 

分 类 号：S641.3[农业科学—蔬菜学]