河南农业科学2017，Vol.46Issue(6)：34-38,5.DOI:10.15933/j.cnki.1004-3268.2017.06.005
基于染色体核型的玉米地方品种聚类分析
Cluster Analysis of Maize Landraces Based on Karyotype Parameters
摘要
Abstract
Fourty maize landraces collected from Southwest China were used as materials,and their mainly karyotype parameters were identified using cytological technology,subsequently,cluster analysis of those maize landraces were conducted by the longest distance method.The results indicated that B chromosomes(Bs) existed in 17 maize landraces,and the total chromosome length,the longest chromosome length,the smallest chromosome length,the ratio of chromosome length,the mean centromere index,the mean arm ratio,as well as the index of karyotypic asymmetry of fourty maize landraces were on an average of 89.56 μm,5.84 μm,2.64 μm,2.46,35.62%,1.48 and 59.06%,respectively,and the corresponding amplitude variations were 61.51-103.82 μm,3.62-7.50 μm,0.98-4.33 μm,1.41-5.21,26.93%-40.33%,1.05-2.43 and 51.20%-70.90%,respectively.In addition,the mean genetic distance among those maize landraces was on average of 10.05,ranging from 3.09 to 46.57.Based on these seven karyotype parameters,40 maize landraces could distinctively be clustered into six groups under the genetic distance of 15.98,group Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ and Ⅵ were consisted of 3,9,4,14,8 and 2 maize landraces,respectively.Great karyotype difference was found in 40 maize landraces,suggesting that abundant genetic variance existed in maize landraces at cytological level in Southwest China.关键词
玉米地方品种/核型/聚类分析Key words
maize landraces/karyotype/cluster analysis分类
农业科技引用本文复制引用
姚启伦,陈发波,何章帅,方平..基于染色体核型的玉米地方品种聚类分析[J].河南农业科学,2017,46(6):34-38,5.基金项目
国家自然科学基金项目(31371633) （31371633）
重庆市科委社会民生项目(cstc2016shmszx80030) （cstc2016shmszx80030）
重庆高校优秀成果转化项目(CGZH1633) （CGZH1633）
