关键词: 红豆草, 种子形态特征, 营养成分, 聚类分析

Abstract: In order to comprehensively evaluate and select excellent new varieties and identify sainfoin (Onobrychis viciaefolia),the morphological characters and nutrient contents among 22 different germplasms of sainfoin seeds from Russian and domestic as research materials were studied. The results showed that there were significant differences in the morphology and nutrient indexes among 22 sainfoin seeds (P<0.05),and the mean coefficience of variation of nutrient content was greater than the coefficient of variation of morphological index. The correlation analysis showed that seed area was extremely significantly positively correlated with seed perimeter,length and width,and a significant positive correlation between seed perimeter and width,length;There was a extremely significant positive correlation between 1 000 seed weight and seed area,width,and a significant positive correlation between 1 000 seed weight and seed perimeter,length,and a significant negative correlation between 1 000 seed weight and crude fat content. The principal component analysis showed that the main factors affecting the sainfoin seeds were length,perimeter and area in the seed morphological characteristics,followed by the crude protein and starch contents in the nutritional indexes. The cluster analysis divided 22 sainfoin seeds into 3 groups,and the comprehensive scores of materials 2668,9155,13523,2323-2,1994 and Onobrychis viciaefolia ‘Gansu’,Onobrychis viciaefolia ‘Mengnong’ were relatively higher,providing excellent germplasm for further research.

Key words: Sainfoin, Seed morphological characters, Nutrient component, Cluster analysis