关键词: 红三叶, 异黄酮, 农艺性状, 营养品质, 产量

Abstract: In order to explore the feasible ways of breeding new red clover (Trifolium pratense L.) germplasm materials with high isoflavone content,we measured the isoflavone content of above ground parts of 300 red clover plants in the experimental site of Helingeer County. K-means cluster analysis method was used to cluster red clover with different isoflavone content into four populations (T1~T4),and morphological characteristics of four red clover populations were observed. The agronomic characters and yield indexes were determined. The results showed that the content of isoflavones in 300 red clover plant ranged from 15.65 mg·g^-1 to 34.16 mg·g^-1,with an average content of 24.88 mg·g^-1. The population of red clover with different isoflavone content had significant differences in morphological characteristics,agronomic traits,grass yield,etc. Among them,the population of red clover with high isoflavone content accounted for 18.67% of the 300 plants,with an average content of 29.61 mg·g^-1. The difference between absolute plant height and natural plant height was more than 15 cm (recumbent type) and the leaf area was less than 350 mm². At the same time,the absolute plant height and grass yield were also significantly higher (P<0.05). The study provides basis for high-yield and high-quality cultivation and variety breeding of red clover.

Key words: Red clover, Isoflavones, Agronomic traits, Yield