Comprehensive Analysis and Evaluation of Main Agronomic Characters of Hordeum vulgare Core Germplasm Resources
The principal component,correlation and cluster analysis of 13 agronomic and yield traits of 60 Hordeum vulgare germplasm resources were carried out.The results showed that the coefficient of variation of each trait ranged from 15.46％to 40.91％,in which the number of main grains per spike was the largest,followed by the weight of main grains per spike,the weight of main grains per spike and the weight of tillers per plant,and the coefficient of variation of 1 000-grain weight was the smal-lest,suggesting that the differences of agronomic traits and yield traits of Hordeum vulgare were mainly determined by the number of main grains per spike,the weight of main grains per spike,and the weight of main grains per spike per plant.Therefore,the improvement of these traits was of great significance to increase the yield of Hordeum vulgare.Principal component analysis showed that most of the agronomic traits of Hordeum vulgare germplasm resources were contained in the first three principal component factors,and the cumulative contribution rate was 85.93％.The main factors were total weight,number of grains per plant,tillering weight per plant,tillering weight per plant,panicle number per plant,1 000-grain weight,panicle length and plant height.The correlation analysis results showed that the yield was highly correlated with plant height,panicle length,tiller weight,tillering weight per plant,total weight,grain weight per plant and 1 000-grain weight,but had little correlation with panicle number per plant,main panicle number and grain number per plant.The re-sults of cluster analysis showed that 60 Hordeum vulgare germplasm resources could be clustered in-to three major groups at 3.5 Chi square distance.Class Ⅰ was high culm and multi-grain high-yield group,Class 11 was low stalk and small low-yield group,and Class Ⅲ was high culm and large spike and large grain high-yield group,reflecting the variety characteristics of Hordeum vulgare germplasm materials in different ecological regions.
万方数据
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