谷子苗期抗旱性种质鉴定OA

Drought is one of the most severe natural disasters worldwide,and identifying crop drought resistance is crucial for variety screening.To provide valuable materials and an evaluation basis for breeding drought-resistant foxtail millet varieties,a comprehensive evaluation of drought resistance at the seedling stage was conducted using 217 foxtail millet germplasm resources.By simulating drought and normal conditions,relevant phenotypic traits were measured,fol-lowed by correlation analysis and principal component analysis.The results indicated that the six relative trait indices exhibited a variation range of 19%to 59%,suggesting rich genetic diversity in drought resistance among the tested ma-terials,which rendered them suitable for drought resistance evaluation.Based on cluster analysis using the comprehen-sive score(F-value)derived from PCA,the 217 foxtail millet germplasms were categorized into four groups:60 acces-sions with drought-resistant type,60 with moderately resistant type,47 with moderately sensitive type,and 50 with sen-sitive type.Furthermore,based on the F-values,the top 10 varieties with the strongest drought resistance were identi-fied as follows:Zhonggu 19,24D1-12,Yugu 18,Yugu 1,Datong 37,W11-50,Nonggu 1,Jinxiangyu Xiaobaimi,Feng-zagu 1,and Yangu 14.