Screening of drought resistance traits and drought resistance evaluation in wheat advanced lines
During the growing seasons of 2020-2021 and 2021-2022,43 and 20 wheat advanced lines were respectively evaluated for 8 agronomic traits and 8 yield traits in three different environments:Drought shelter(DS),Yangling Agricultural Station l(YAS)and Qianxian(QX).The contribution of each trait to wheat drought resistance was assessed by calculating the drought resistance index.Comprehensive analyses were performed using methods such as the membership function and cluster analysis to select wheat advanced lines with high drought re-sistance.The results indicated that under drought stress(DS),both agronomic and yield traits of wheat were sup-pressed to varying degrees.Based on the contribution of each trait to wheat drought resistance,several important in-dicators for evaluating wheat drought resistance,such as biomass,yield,spikelet number,and thousand-grain weight were selected.Through comprehensive drought resistance index(D)and cluster analysis,the tested wheat varieties(lines)were categorized into five levels:highly drought-resistant,drought-resistant,moderately drought-resistant,drought-sensitive,and highly drought-sensitive.In the two years of assessment,a total of 6 highly drought-resistant wheat lines including 21-1,21-34,21-39,21-18,21-2,and 22-17 were identified.
国家科技期刊平台
NSTL
万方数据
维普
