西南农业学报2026，Vol.39Issue(4)：750-757,8.DOI:10.16213/j.cnki.scjas.2026.4.006
90份甜玉米种质的遗传多样性及遗传结构分析
Genetic diversity and genetic structure analysis of 90 sweet corn germplasms
摘要
Abstract
[Objective]A systematic analysis was conducted on the genetic diversity and population structure of 90 sweet corn germplasms to explore suitable heterosis models and provide theoretical basis for sweet corn germplasm innovation and breeding of breakthrough new varie-ties.[Method]A 10K SNP maize chip was used to perform genome-wide scanning of the 90 sweet corn germplasms.Genetic similarity analy-sis,kinship analysis,and phylogenetic analysis were conducted to elucidate the genetic diversity and population structure.[Result]A total of 47 212 high-quality SNP markers were screened,with an average of 4721 markers per chromosome.The minor allele frequency(MAF)ranged from 0.005 to 0.5000,with an average of 0.2469.The polymorphism information content(PIC)ranged from 0.0905 to 0.6676,with an average of 0.2727,indicating a moderate level of polymorphism and relatively rich genetic diversity.The genetic similarity coefficient(GSC)ranged from 0.4586 to 0.9948,with an average of 0.6238.The lowest GSC was observed between SHENGTAF and TNL162(0.4586),indicating the greatest genetic divergence and distant relationship,whereas the highest GSC(0.9948)was found between YUET16-2 and YUET2-2,suggesting nearly identical genetic backgrounds,possibly derived from the same inbred line.Phylogenetic analysis divided the 90 germplasms into three groups:Group A consisted of 23 temperate germplasms such as GTL990,GTL1682 and GTL1622,Group B contained 19 tropical germplasms such as GTL3412,GTL3411,and GTL1706,and Group C comprised 48 subtropical germplasms such as ATL122,GTL312 and XUET 7401.[Conclusion]The 90 sweet corn germplasms exhibited rich genetic diversity.The heterotic pattern of'temperate × tropical germplasms'and'temperate × subtropical germplasms'can be used as ideal breeding heterosis model for sweet corn breeding in Guangxi.关键词
甜玉米/种质资源/遗传多样性/SNPKey words
Sweet corn/Germplasm resources/Genetic diversity analysis/SNP分类
农业科技引用本文复制引用
莫润秀,黄开健,黄爱花,翟瑞宁,邹成林,杨萌,韦新兴,贺囡囡..90份甜玉米种质的遗传多样性及遗传结构分析[J].西南农业学报,2026,39(4):750-757,8.基金项目
广西科技重大专项(桂科AA22068095-8) （桂科AA22068095-8）
