中国马铃薯2025，Vol.39Issue(6)：410-418,9.DOI:10.19918/j.cnki.1672-3635.2025.06.002
12个马铃薯种质材料的染色体核型分析
Karyotype Analysis of 12 Potato Germplasm Materials
摘要
Abstract
Potato,as a globally significant food crop,possesses rich genetic diversity in both its wild species and cultivated varieties,providing invaluable genetic resources for breeding research.This study aimed to clarify the chromosome numbers,karyotype characteristics,and genetic relationships between wild and cultivated potato species and analyze the chromosomal genetic diversity of wild and cultivated potato species.In this study,wild and cultivated potato species were used as materials,and the karyotype analysis of their chromosomes was carried out by the root-tip squashing method.The 12 potato germplasm materials included two ploidy levels:diploid(2n=2x=24)and tetraploid(2n=4x=48).'1886-71Y','T8Y','2014-89-61','2011-5-21',and'2014-89-47'were diploids,while the rest were tetraploids.For karyotype types,only'Longshu 309'was type 2A,and the others were of the 2B type.All chromosomes were composed of metacentric and submetacentric chromosomes.The karyotype asymmetry coefficient ranged from 55.59%to 64.28%,and the average arm ratio was between 1.33 and 1.77.The karyotype evolution analysis trend indicated that'Xisen 6'had the highest degree of evolution,while'2011-5-21'had the lowest.At a genetic distance of 17,the 12 potato germplasm materials were divided into three categories.This study systematically elucidates the chromosomal karyotype differences and evolutionary relationships between wild and cultivated potato species and provides an important theoretical basis for potato molecular breeding practice and genetic diversity analysis.关键词
马铃薯/野生种/栽培种/核型分析/核型进化趋势/亲缘关系Key words
potato/wild species/cultivated species/karyotype analysis/karyotype evolutionary trend/genetic relationship分类
农业科技引用本文复制引用
桑乐飞,贾明飞,张淑青,曹超凡,王雅宁,田再民,韩红艳,张宏宇..12个马铃薯种质材料的染色体核型分析[J].中国马铃薯,2025,39(6):410-418,9.基金项目
河北北方学院博士基金(BSJJ202428) （BSJJ202428）
河北北方学院校级课题(XJ2023019) （XJ2023019）
河北省现代农业产业技术体系薯类创新团队(HBCT2018080201) （HBCT2018080201）
早熟优质抗病马铃薯育种技术创新及应用(232490042A) （232490042A）
河北北方学院大学生创新创业训练计划项目(S202510092025). （S202510092025）
