Abstract:

The paper aims to understand the diversity of flax germplasm resources, make full use of its beneficial genes and improve flax breeding efficiency. The main agronomic characters of 12 flax materials introduced from 8 domestic breeding units were analyzed and evaluated comprehensively. The results showed that the variation coefficient of agronomic characters ranged from 18.4% to 63.13%, and the difference between the tested materials was obvious. Correlation and grey correlation analysis showed that branch number and plant height were the most important factors affecting the yield. The main agronomic characters were grouped into three main components by principal component analysis, which were branch number factor, process length factor and single fruit number factor. Path analysis showed that increasing the number of branches and grain weight per plant could effectively increase the yield. When the Euclidean distance was 4.02, the 12 test materials were divided into three groups by cluster analysis, and main characteristics of the third group were the highest plant height and process length, the largest number of branching stems, the highest grain weight per plant and yield, and the best comprehensive performance.

Key words: flax, new strain, agronomic characters, principal component analysis, clustering analysis