The Correlation Analysis on Basic Agronomic Traits and See Yields of Agropyron Gaertn
The correlation analysis,regression analysis,path analysis and cluster analysis of plant height,spike length,spike width,spikelets per spike,florets per spikelet,grains per spikelet,panicle weight,branch number and seed yield of 16 varieties(lines)were carried out with field experiment to study the rela-tionship between seed yield and agronomic traits of Agropyron Gaertn.,and to provide a theoretical basis for the breeding of high seed yield of Agropyron Gaertn.The results showed that the genetic diversity of Agropyron varieties(lines)was rich,and the coefficient of variation of agronomic traits ranged from 2.25%to 64.00%.The correlation analysis and path analysis showed that panicle weight was positively correlated with seed yield(P<0.01),and the correlation between spike width,spikelets per spike and florets per spikelet and seed yield reached a significant level(P<0.05);The direct contribution to seed yield was spike width,florets per spikelet,panicle weight,spikelets per spike.The study materials were divided into four groups at the squared Euclidean distance 5.0 with the clustering analysis,taxa Ⅰ and Ⅱ showed the better seed yield,and Hycrest-Mengnong,AZ1513 and AZ879 could be used as high seed yield resources.