艾草种质资源农艺性状的综合评价

Comprehensive Evaluation of Agronomic Traits in Artemisia argyi Germplasm Resources

开展艾草种质资源农艺性状的综合评价,旨在为艾草新品种遗传改良提供理论参考。本研究采用SPSS 25.0软件对70个艾草种质资源的13个农艺性状进行相关分析、主成分分析、聚类分析和综合评价。结果表明,13个农艺性状的遗传多样性指数为1.33~2.01,遗传多样性指数大于1.50的农艺性状有12个,占供试种质的92.31%;变异系数为16.97%~78.04%,变异系数大于30.00%的农艺性状有8个,占61.54%;大部分农艺性状间存在显著或极显著相关。在主成分分析中,前5个主成分反映了13个农艺性状的大部分信息,累计方差贡献率达到76.31%。聚类分析在欧式距离为12.0处可将70个艾草种质资源聚为2类群,第Ⅰ类群包含45个种质,呈现出第一分枝叶片数多、叶片长、叶片宽、单株鲜重高等4个有益性状;第Ⅱ类群包含25个种质,呈现出叶柄短、两叶鲜重高、五叶间距短等3个有益性状;根据综合得分值(F),筛选出农艺性状综合表现最好的5份艾草种质资源。本研究中70个艾草种质资源具有丰富的遗传多样性,将为艾草遗传改良、保护和利用提供理论依据。

The comprehensive evaluation of agronomic traits of Artemisia argyi germplasm resources,which would provide theoretical reference for new varieties genetic improvement.In this study,SPSS 25.0 software was used to conduct correlation analysis,principal component analysis,cluster analysis and comprehensive evaluation of 13 agronomic traits of 70 Artemisia argyi germplasm resources.The results showed genetic diversity indexes of 13 agronomic traits were 1.33~2.01,12 agronomic traits more than 1.50,were respectively,accounting for 92.31%of varieties tested.The coefficient variation of 13 agronomic traits ranged from 16.97%to 78.04%,8 agronomic traits with coefficient of variation greater than 30.00%,accounting for 61.54%.There was significant or extremely significant correlation among most agronomic characters.Five principal components reflected most of the information of 13 agronomic traits,and the cumulative variance contribution rate reached 76.31%.70 Artemisia argyi germplasm resources could be grouped into 2 groups at 12.0 euclidean distance.The I group contained 45 varieties,which showed four beneficial characters:more leaves in the fi rst branch,longer leaves,wider leaves and higher fresh weight per plant.The second group contained 25 varieties,which showed three beneficial characters:short petiole at the top,high fresh weight of two leaves and short distance between five leaves.According to the comprehensive score(F),the five varieties with the best agronomic traits were selected.The genetic diversity of of 70 Artemisia argyi germplasm resources was high,which would provide theoretical basis for genetic improvement,protection and utilization of germplasms of Artemisia argyi.