Analysis of Yield,Yield Components and Growth Period Differences in Xizang Winter Barley Varieties

Zhaci; Cidanzhuoga; Cuose; Gongsang; Dazengquzong; Nimazhuoga; Cirenwangdui; Cirenyangzong; Lazhen; Dawadunzhu; Zhuoga

doi:10.14069/j.cnki.32-1769/s.2025.03.005

Abstract：To explore the interactions and overall performance among the growth period,yield,and yield components of different varieties of winter barley(Qingke)in Xizang,10 winter barley varieties from Xizang were used as research materials to analyze growth period,yield,number of spikes per plant,number of grains per spike,and thousand-grain weight.The results showed that among all the statistical traits,the trait with the largest coefficient of variation(CV)was the number of spikes per plant,with a CV of 38.14％,while the smallest CV was for the growth period,at 2.16％.The order of traits with a CV greater than 20％was number of spikes per plant,spike weight,yield,number of effective spikes and spike length.Correlation analysis indicated that the growth period was extremely significantly positively correlated with plant height.Yield was negatively correlated with the number of spikes per plant and spike weight,but positively correlated with all other traits,and it was significantly positively correlated with the number of effective spikes.Among the three yield components,the number of effective spikes was significantly negatively correlated with thousand-grain weight,and it had an insignificant negative correlation with the number of grains per spike.The number of grains per spike was extremely significantly positively correlated with plant height,spike length,and spike weight.Thousand-grain weight was significantly positively correlated with spike weight and the number of grains per spike.In conclusion,the main sources of variation among the tested varieties were the number of spikes per plant,spike weight,yield,number of effective spikes,and spike length.Yield was mainly influenced by the number of effective spikes,which had a restrictive effect on thousand-grain weight and the number of grains per spike.The number of grains per spike and thousand-grain weight had a mutually promoting relationship and were both positively affected by spike weight.