摘要
采用主成分分析法和聚类分析法,对150份河南红花优质种质资源的12个表型性状开展遗传多样性研究和综合评价,旨在为选育红花新品种提供参考。结果表明:河南红花种质资源具有较丰富的遗传多样性,其中,顶果球着粒数的多样性指数最高,其次是顶果球直径、千粒质量和节间长度;单株有效果球总数的变异系数最大,其次是分枝总数、顶果球着粒数、节间长度,最小的为粒长和粒宽。基于各种质间12个表型性状的遗传差异,对150份红花种质进行聚类分析,可在遗传距离为10.15处将其划分为6大类群。第Ⅰ类群以顶果球直径和顶果球着粒数均最大;第Ⅱ类群粒长最大、茎秆最粗、节间长度最短;第Ⅳ类群千粒质量最大、籽粒最宽;第Ⅴ类群株高最高,节间数、分枝总数和单株有效果球总数最多;第Ⅲ和Ⅵ类群的有益性状不明显。在主成分分析中,前4个主成分反映了12个性状的绝大部分信息,累计方差贡献率达到70.08%。第1主成分贡献率为26.07%,主要是分枝总数和单株有效果球总数的综合反映;第2主成分贡献率为17.58%,主要是顶果球着粒数和顶果球直径的综合反映;第3主成分贡献率为14.23%,主要是千粒质量、粒长及粒宽的综合反映;第4主成分贡献率为12.20%,主要是株高、第一分枝高度和节间数的综合反映。河南红花种质的表型综合值(F值)平均为0.36。其中,HH085的综合性状表现较好,其F值最高,为0.89。
In order to offer technical references for safflower breeding,the genetic diversity and comprehensive evaluation for 12 phenotypic traits in 150 Henan safflowers were analyzed by using principal component analysis and cluster analysis. The main results showed Henan safflowers had accordingly greater genetic diversities. The diversity index of seed number of top fruit was the highest,then diameter of top fruit,the thousand seed weight,the internode length. The variation coefficient of the total fruit number per plant was the largest,then the branch number,the seed number of top fruit,internode length,but variation coefficients of seed length and seed width are smallest. Based on genetic differences of 12 phenotypic traits,cluster analysis of 150 Henan safflowers was classified as 6 groups by geneticdistance of 10. 15. diameter and the seed number of top fruit were largest in the first group; the second group contained the longest seed length,widest stem width,shortest internode length; the forth group included highest thousand seed weight and widest seed width; the fifth group had good traits of highest plant height,largest node number,largest branch number,largest total fruits number per plant; but the third and sixth group had not significant benefit traits. The principal component analysis of 12 phenotypic traits showed that the top four traits principal components accounted for 70. 08% of all principal components,the first principal component was branch number and total fruits per plant and accounted for 26. 07%,the second principal component was seed number and diameter of top fruit and accounted for 17. 58%,the third principal component was seed weight,seed length and seed width and accounted for 14. 23%,the forth principal component was height plant,height of first lateral branch and node numbers and accounted for 12. 20%. The comprehensive value（ F value） of phenotypic traits of safflower collections averaged 0. 36. The highest F value of 0. 89 was from HH085.
出处
《河南农业科学》
CSCD
北大核心
2017年第10期26-31,共6页
Journal of Henan Agricultural Sciences
基金
现代农业产业技术体系建设专项资金项目(CARS-21)
国家农业科研杰出人才及其创新团队项目[农财发(2016)45号]
河南省科技攻关计划项目(172102110088)
河南省农业科学院自主创新基金项目(2017ZC69)
河南省农业科学院科研发展专项资金项目(201513110)
河南省超级产粮大省奖励资金扶持粮油良种培育等项目
河南省财政预算项目
关键词
河南省
红花
种质资源
表型性状
遗传多样性
主成分分析
综合评价
Henan province
safflower
germplasm resources
phenotypic traits
genetic divercipal components analysis
comprehensive value of phenotypic traits
