基于SNP芯片划分CIMMYT和广西玉米自交系杂种优势群  

HeteroticGroups of CIMMYT andGuangxiMaize Inbred Lines by SNP Chips

作　　者：邹成林 谭华 黄开健 翟瑞宁 黄爱花 莫润秀 韦新兴 杨萌 吕巨智 黄艳芬 Zou Chenglin;Tan Hua;Huang Kaijian;Zhai Ruining;Huang Aihua;Mo Runxiu;Wei Xinxing;Yang Meng;LüJuzhi;Huang Yanfen(Maize Research Institute,Guangxi Academy of Agricultural Sciences,Nanning,530007)

机构地区：[1]广西壮族自治区农业科学院玉米研究所,南宁530007

出　　处：《分子植物育种》2024年第2期480-489,共10页Molecular Plant Breeding

基　　金：国家重点研发计划项目(2018YFD0100105,2016YFD0101206-6);广西科技重大专项(桂科AA17204064);国家现代农业产业技术体系广西创新团队建设专项(nycytxgxcxtd-2021-04-04);广西农业科学院基本科研业务专项(桂农科2021YT015)共同资助。

摘　　要：CIMMYT玉米自交系在广西具有较好的适应性,目前利用CIMMYT和广西玉米自交系杂交已成功选育出许多适合广西种植的玉米新品种。为了解CIMMYT和广西玉米自交系间的杂种优势关系,本研究以20份CIMMYT自交系和169份广西自交系为供试材料,以5份中国骨干自交系和4份广西骨干自交系作为参照系,利用10K玉米SNP芯片进行全基因组扫描,开展遗传相似性、系统进化树和主成分分析,划分参试材料的杂种优势群。研究结果表明,189份玉米自交系绝大多数杂合率均小于10%,纯合度较高。CIMMYT自交系相互间遗传相似性较高,与广西玉米自交系间遗传相似度较低。进化树和主成分分析将189份自交系分为PB群、SPT群、‘桂单162-0810’母本群、‘桂单162’父本群、‘桂单0810’父本群和其他类群,其中大部分CIMMYT玉米自交系属于SPT群,大部分广西玉米自交系属于‘桂单162-0810’母本群、‘桂单0810’父本群和其他类群。可见,CIMMYT与广西玉米自交系间遗传差异较大,大多属于不同杂种优势群,两类自交系进行杂交能够较大概率获得优良玉米品种。CIMMYT maize inbred lines have good adaptability in Guangxi.At present,many new maize varieties suitable for planting in Guangxi have been successfully selected by hybridization between CIMMYT and Guangxi maize inbred lines.In order to understand the heterosis relationship between CIMMYT and Guangxi maize inbred lines,20 CIMMYT inbred lines and 169 Guangxi inbred lines were used as test materials,5 Chinese Backbone inbred lines and 4 Guangxi Backbone inbred lines were used as reference systems,the whole genome was scanned by 10K maize SNP chip,genetic similarity,phylogenetic tree and principal component analysis were carried out,and the heterosis groups of the test materials were divided.The results showed that the heterozygosity of most 189 maize inbred lines were less than 10%,and the homozygosity was high.The genetic similarity between CIMMYT inbred lines were high,and the genetic similarity between CIMMYT inbred lines and Guangxi maize inbred lines were low.Phylogenetic tree and principal component analysis divided 189 inbred lines into PB group,SPT group,'Guidan 162-0810'female parent group,'Guidan 162'male parent group,'Guidan 0810'male parent group and other groups.Most CIMMYT maize inbred lines belong to SPT group,and most Guangxi maize inbred lines belong to'Guidan 162-0810'female parent group,'Guidan 0810'male parent group and other groups.It could be seen that there were great genetic differences between CIMMYT and Guangxi maize inbred lines,and most of them belong to different heterosis group.Hybridization between CIMMYT and Guangxi maize inbred lines can obtain excellent maize varieties with a high probability.

关 键 词：SNP芯片 CIMMYT 玉米自交系 杂种优势群 

分 类 号：S513[农业科学—作物学]