摘要
【目的】对30份马铃薯种质资源进行遗传多样性评价,为更好地利用马铃薯种质资源及品种创新提供理论依据。【方法】基于差异性,利用多样性指数、主成分分析、相关性分析和聚类分析对30份马铃薯种质资源的遗传多样性进行评价。【结果】马铃薯品种(系)质量性状多样性指数为0.673~1.424,其中,叶片颜色、肉色、薯形遗传多样性指数较高;数量性状遗传多样性指数为1.705~1.997,其中,商品薯率最大、主茎数最小。主成分分析结果表明,前4个主成分累计贡献率为75.989%,可反映大部分性状信息。相关性分析结果表明,株高与商品薯率、产量均呈显著正相关(P<0.05)。通过聚类分析,将30份马铃薯种质资源分为3大类群,第Ⅰ类群包含8份材料、第Ⅱ类群包含9份材料、第Ⅲ类群包含13份材料。【结论】30份马铃薯种质资源可分为3大类群,变异丰富,遗传多样性广泛。
【Objective】To make full use of potato germplasm resources and provide theoretical basis for potato variety creation,the genetic diversity of 30 collections was evaluated.【Methods】The genetic diversity evaluation of 30 potato germplasm resources were analyzed and evaluated by the difference,genetic diversity index,principal component analysis,correlation analysis and cluster analysis.【Results】The diversity index of quality traits of potato varieties(lines)ranged from 0.673 to 1.424.The diversity index of leaf color,flesh color and tuber shape was higher.The diversity index of quantitative traits ranged from 1.705 to 1.997,with the commercial potato rate being the highest and the number of main stems being the lowest.Principal component analysis showed that the cumulative contribution rate of the first four principal components was 75.989%,which could cover information for most characters.Correlation analysis showed that plant height was positive(P<0.05)correlated with the rate of commercial potato and yield.30 potato germplasm resources were divided into 3 groups using cluster analysis.GroupⅠcontained 8 materials,groupⅡcontained 9 materials,and groupⅢcontained 13 materials.【Conclusion】The 30 potato germplasm resources were classified into 3 major groups,with rich variation and wide genetic diversity.
作者
韩志刚
谢锐
金晓蕾
郭斌煜
郭景山
HAN Zhigang;XIE Rui;JIN Xiaolei;GUO Binyu;GUO Jingshan(Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;College of Agriculture,Inner Mongolia Agricultural University,Hohhot 010019,China;Hebei Agricultural University,Baoding 071001,China)
出处
《北方农业学报》
2021年第5期9-17,共9页
Journal of Northern Agriculture
基金
国家马铃薯产业技术体系项目(CARS09-ES03)
内蒙古自治区科技重大专项项目(ZDZX2018019)。
关键词
马铃薯
种质资源
聚类分析
遗传多样性
Potato
Germplasm resources
Cluster analysis
Genetic diversity
