关键词: 韭菜, 花器官, 表型性状, 遗传多样性, 聚类分析

Abstract: In order to study Chinese chive's genetic diversity from the angle of floral phenotypic traits，this paper selected 56 accessions of germplasm resouces and conducted genetic diversity analysis and clustering analysis．The results indicated that the genetic diversity index of each Chinese chive qualitative character was 0.15-1.02．Among them，flower bud rib color had the largest gentetic diversity index；the second largest was anther color；and the smallest was inflorescence shape．The variable coefficient of each quantitative character of floral organ was 9.60%-31.56%．The genetic diversity index was 1.50-2.02，of which capsule amount per infructescence had the largest variable coefficient and genetic diversity index. The variable coefficients of the ratio of the petal length to the sepal length were minimum，and genetic diversity index of involucre length was minimum．The variable coefficients（14.61%）and diversity index（1.91）of the ratio of the sepal length to its width were all greater than the variable coefficients（12.04%）and diversity index（1.82）of the ratio of the petal length to its width，indicating that among Chinese chive germplasm resouces，sepal shape had higher richness and variation range than petal shape．Moreover，among all quantitative traits related to perianth，the variable coefficient and diversity index of the ratio of the sepal length to its width were all the highest．As you see，it is an important indicator for identifying Chinese chive germplasm resources．Conducting hierarchical clustering analysis by 10 qualitative traits of floral organ，the 56 tested accessions of Chinese chive germplasm resouces were divided into 4 categories．

Key words: Chinese chive, floral organ, phenotypic character, genetic diversity, clustering analysis