摘要
为深入研究野杏种质资源遗传多样性,筛选发掘和高效利用野杏资源,本研究采用聚类分析、相关分析、主成分分析和逐步线性回归分析,对54个野杏无性系的40个表型性状(其中,15个质量性状和25个数量性状)进行了研究。结果表明:54个野杏无性系变异程度高,类型多样,遗传多样性丰富。其中,25个数量性状的变异系数均值为18.19%,单果重的变异系数最大(42.56%);数量性状的多样性指数(1.980)大于质量性状(0.761),核形指数的多样性指数最大(2.082)。聚类分析将54个野杏无性系分为5个类群,类群Ⅰ可用于选育高出核率、高出仁率类型及特殊叶形的种质资源;类群Ⅱ可用于选育特殊果实类型的种质;类群Ⅲ可作为培育特殊核、仁型品种的亲本材料;类群Ⅳ可用于选育大核、大仁、丰产类型的种质;类群Ⅴ可作为核壳用资源。主成分分析表明前7个主成分能代表25个数量性状的大部分信息,累计贡献率达83.31%。野杏无性系表型性状的综合评价结果表明,甘肃会宁县的270号的综合得分最高(0.756)。结合逐步线性回归方法筛选出小枝粗度、叶片长度、果长、单果重、核长、核宽、核厚、单核重、仁宽、仁形指数和出仁率可作为野杏无性系表型性状评价的重要指标。
This study attempted to study the genetic diversity of Armeniaca vulgaris var.ansu germplasm provenances.Fifteen qualitative indexes and 25 quantitative indexes of 54 clones were investigated and subjected for cluster analysis,correlation analysis,principal component analysis and stepwise linear regression analysis.The results showed that the phenotypic traits of 54 Armeniaca vulgaris var.ansu clones have a high degree of variation,diverse types and rich genetic diversity.Among them,the average variation coefficient of the 25 quantitative indexes was 18.19%,with the largest variation coefficient on single fruit weight(42.56%).The mean of Shannon-wiener index in quantitative indexes(1.980)was greater than that in qualitative indexes(0.761),the Shannon-wiener index of leaf-form index was the largest(2.082).The Armeniaca vulgaris var.ansu clones were divided into five groups,including:GroupⅠcontained germplasm resources with high nutlet rate,high kernel rate and special leaf shape;GroupⅡ,which included germplasm resources with special types of fruit;Group III contained elite lines with potential use in breeding for special nutlet and kernel types;Group IV contained the germplasm with large-nutlet,large-kernel,and high-yield;Group V contained nutlet shell resources.Principal component analysis indicated that the first seven principal components of the 25 quantitative indexes explained 83.31%of the cumulative contribution rate.An elite line No.270 from Huining county of Gansu province represented a highest comprehensive score.By analysis together with stepwise linear regression method,11 indexes,including branchlet width,leaf length,fruit length,single fruit weight,nutlet length,nutlet width,nutlet thickness,single nutlet weight,kernel width,kernel shape index and nutlet rate,were proposed as important indexes to evaluate phenotypic variations of Armeniaca vulgaris var.ansu clones.
作者
董胜君
孙永强
陈建华
卢彩云
刘权钢
刘立新
DONG Sheng-jun;SUN Yong-qiang;CHEN Jian-hua;LU Cai-yun;Liu Quan-gang;LIU Li-xin(College of Forestry,Shenyang Agricultural University,Shenyang 110866;Forestry Bureau of Kazuo County in Liaoning Province,Chaoyang l2230)
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2020年第5期1156-1166,共11页
Journal of Plant Genetic Resources
基金
国家重点研发计划项目资助(SQ2019YFD100071)。
关键词
野杏
表型性状
多样性
综合评价
Armeniaca vulgaris var.ansu
phenotypic traits
genetic diversity
comprehensive evaluation
