内蒙古扁蓿豆种质资源花性状的变异分析

Analysis of Flower Character Variation of Medicago ruthenica in Inner Mongolia

采用形态学标记的方法,对来源于内蒙古7个不同生态区的49份扁蓿豆野生材料进行了花性状变异分析。对花萼长、花萼直径等12个性状进行系统调查和遗传多样性分析。结果表明:扁蓿豆材料间花性状的变异系数幅度最大的为花序长,其变异系数高达79.12%,变异幅度最小的为花萼直径,其变异系数为3.82%;主成分分析表明,花性状中前7个主成分反映了总信息量的85.465%,花序长、花序轴长、花冠长度、花序结荚数、花序种子数、花色和小花柄长等7个性状是造成扁蓿豆花性状变异的主要因素;相关分析表明,花性状间多数呈差异显著或极显著;聚类分析将49份材料分为6类,花性状变异性相同或地理来源相同与相近的材料大部分聚在一起。可见,扁蓿豆材料间的花性状具有丰富的遗传多样性。

Genetic variations of 49 M. ruthenica wild gemplasm from seven different origin in Inner Mongolia. Twelve floral properties, including calyx diameter, coronary length, number of inflorescence flowers have been studied and investigated with morphological marcers. The results showed that M. ruthenica between material the magnitude of the coefficient of variation was the largest flower traits for inflorescence length, the variation coefficient of 79. 12%. The variation of the smallest for the calyx diameter,the coefficient of variation was 3.82%. Principal com- ponent analysis showed that floral traits in the first 7 principal components reflect the total information content 85.465%, inflorescence length, inflorescence axis length, corolla length, inflorescence podding number, inflores- cence seeds, flower color and little flower shank length of seven characters is the main factor causing variation in traits of M. ruthenica. The correlation analysis showed that ： More flower traits were highly significantly and extreme significantly related, For example, inflorescence podding number and Inflorescence seeds had extremely significant difference ,0. 811, had a significant positive correlation, while significant inflorescence axis length and little flower shank length showed a significant negative correlation,-0. 340. The 49 materials are divided into six kinds of cluster analysis. Flower character same source or geographical variability with similar material part can get together. Floral traits in M. ruthenica materials have abundant genetic diversitv.