摘要
为客观评价130份燕麦(Avena sativa)种质资源,从而为燕麦新品种选育提供关键数据,本研究对130份燕麦种质的14个表型性状进行了遗传多样性分析,对其中10个数量性状进行了聚类分析和主成分分析,在主成分分析的基础上综合评价了130份燕麦种质。结果表明:14个表型性状的遗传多样性指数均较高,其中最高的是株高(1.91),其次为根长(1.90);变异系数最大的是有效分蘖数(48.85%),其次是分蘖数(45.66%);主成分分析显示,前4个主成分的变异占总变异的77.65%,第一主成分反映轮层数,第二主成分反映分蘖数,第三主成分反映主穗长,第四主成分反映叶宽,通过综合评价及二维排序筛选出了综合性状优秀、各主成分表现突出、4个因子协调较好的优异种质材料;系统聚类分析将130份种质划分为5类,种质群Ⅰ、Ⅱ的材料可作为筛选籽粒型燕麦的优良亲本;种质群Ⅲ的材料并未发现突出特点;种质群Ⅳ、Ⅴ的种质综合性状突出,可直接引种或作为筛选高产饲用型燕麦和选育多目标性状的优良亲本。
A comprehensive evaluation of the phenotypic diversity of 130 oat germplasms was made using genetic diversity indexes.Principal components analysis and cluster analysis were used to investigate the genetic diversity of agronomic characteristics from different sources.The results showed high genetic diversity indices for 14 traits.The highest index value was for height(1.91),followed by root length(1.90).The largest coefficient of trait variation was the effective number of tillers(48.85%),followed by the number of tillers(45.66%).According to principal component analysis,the first four main components(layer factor,tiller factor,main ear length factor,leaf width factor)explained 77.65%of the variation.The cluster analysis showed that ten quantitative traits could be used to classify plants into four groups.GroupsⅠandⅡwere important parents for screening oats,groupⅢwas not found to be prominent,and groupsⅣandⅤhad excellent comprehensive traits.Results showed that the quality of oat germplasms could be determined by comprehensive evaluation and two-dimensional sorting.The best germplasms identified here can be used as parents to screen high-yield forage oats or to select multi-target traits.
作者
耿小丽
张榕
张少平
李德明
刘乾
武慧娟
GENG Xiaoli;ZHANG Rong;ZHANG Shaoping;LI Demin;LIU Qian;WU Huijuan(Grassland Technology Extension Station of Gansu Province,Lanzhou 730070,Gansu,China)
出处
《草业科学》
CAS
CSCD
2020年第10期2022-2034,共13页
Pratacultural Science
基金
兰州市人才创新创业项目(2018-61)
甘肃省2016年草牧业科技支撑项目(GCLM20160010)。
关键词
燕麦种质
表型性状
遗传多样性
综合评价
oat
phenotypic traits
genetic diversity
comprehensive evaluation