Analysis and Evaluation of Main Agronomic Traits of 37 New Barley Varieties(Lines)
LYU Ersuo
MA Yu
XU Guangxiang
BA Tu
QU Jiahui
LI Tao
LIU Zhiping
Abstract：In order to better breed new barley varieties suitable for planting and promotion in Inner Mongolia,9 traits of 37 new barley lines were compared by principal component,correlation and cluster analysis.The results showed that the coefficient of variation of each trait was between 8.54％and 30.52％,and the order from the largest to the smallest was single grain weight,number grains per spike,number grains per plant,number of spikes per plant,and grain weight main spike.The minimum coefficient of variation of plant height was 8.54％.The difference in agronomic traits and yield traits of barley was mainly determined by the factors such as grain weight per plant,number grains per main spike,number of grains per plant,number spikes per plant,and grain weight main spike.Therefore,the improvement of these traits is of great significance to increase the yield of barley.Principal component analysis showed that most of the information of agronomic traits of new barley lines was contained in the first four principal component factors,and the cumulative contribution rate was 83.468％.The main factors were grain number per plant,grain number per main spike,grain weight per main spike and grain weight per plant.The results of correlation analysis showed that there was a strong correlation between yield and grain number per main spike,reaching a significant level(0.307).There was a positive correlation between yield and grain weight per main spike,grain weight per plant.There was no significant correlation between yield and plant height,spike number per plant and 1 000-grain weight.There was a significant negative correlation between yield and main spike length.The results of cluster analysis showed that 37 varieties(lines)could be clustered into three groups at the chi-square distance of 3.0,the first group was the small grain and multi-edge high yield group,the second group was the high stem and large grain group,and the third group was the long ear and low yield group.
Keywords：BarleyAgronomic traitPrincipal component analysisCorrelation analysisCluster analysis
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 29-36 )