西南农业学报2026，Vol.39Issue(3)：484-492,9.DOI:10.16213/j.cnki.scjas.2026.3.002
31份西南中高海拔区玉米自交系遗传背景分析
Genetic background analysis of 31 maize inbred lines from the middle and high altitude areas in southwest China
摘要
Abstract
[Objective]The paper aimed to explore the mainstream heterozygous models in the middle and high-altitude maize production are-as in southwest China at present.[Method]31 inbred lines in this area were taken as the research materials,and the genetic diversity analy-sis was conducted by combining phenotypic clustering and molecular clustering methods.[Result]The coefficient of variation of their genetic similarity coefficient among 31 maize inbred lines was 11.96％-61.98％for the main agronomic trait variation coefficient,and cluster anal-ysis divided them into 5 groups.A total of 146 number of alleles were detected by 40 pairs of SSR core primers,with 2-10 number of alleles detected by each primer pair,and an average of 3.65 number of alleles detected by each primer pair;the gene diversity index ranged from 0.2066 to 0.8637,with an average of 0.5748;the number of effective alleles ranged from 1.3687 to 7.6115,with an average of 2.8575;the Shannon index varied from 0.4913 to 2.1476,with an average of 1.0574;and the polymorphism information content(Polymorphic informa-tion content,PIC)ranged from 0.1963 to 0.8490,with an average PIC of 0.5183.UPGMA clustering method was used to divide 31 maize in-bred lines into 8 groups:Tuxpeno,Brazilian germplasm,Luda Honggu,Lancaster,Mo Bai 1,Suwan,Reid and Tang Sipingtou.[Conclusion]The study effectively classified the tested materials by using both phenotypic and molecular clustering methods.The 31 maize inbred lines were successfully divided into eight groups:Tuxpeno,Brazilian germplasm,Luda Honggu,Lancaster,Mo Bai 1,Suwan,Reid and Tang Sipingtou.The population classification was basically consistent with the pedigree.关键词
中高海拔/玉米/杂交种/自交系/遗传背景Key words
Medium and high altitudes/Maize/Hybrid/Inbred lines/Genetic background分类
农业科技引用本文复制引用
龙云星,程金朋,张时军,李圆圆,王晓娇,陈宇,张芷艺,罗开勇,伏林,王世敏..31份西南中高海拔区玉米自交系遗传背景分析[J].西南农业学报,2026,39(3):484-492,9.基金项目
云南省科技人才与平台计划中青年学术及技术带头人后备人才项目(202305AC160042) （202305AC160042）
云南省科技人才与平台计划院士专家工作站项目(202305AF150082) （202305AF150082）
昭通市院士专家工作站项目(2022ZTYX16) （2022ZTYX16）
