草地学报2026，Vol.34Issue(5)：1677-1690,14.DOI:10.11733/j.issn.1007-0435.2026.05.011
无芒雀麦种质材料萌发期耐旱性综合评价
Comprehensive Evaluation of Drought Tolerance in Bromus inermis Germplasm at the Germination Stage
摘要
Abstract
Drought is one of the primary stress factors affecting plant production,and the germination stage is the most vulnerable period in the plant life cycle.In the breeding of drought-resistant Bromus inermis,evaluat-ing drought tolerance during the germination stage is particularly important.This study employed the double-layer filter paper germination method,measuring eight indicators-including germination rate,germination poten-tial,germination index,root length,and shoot length-under 25%PEG-6000 stress for 100 B.inermis germ-plasm resources.Principal component analysis,membership functions,and hierarchical clustering analysis were used to comprehensively assess drought tolerance during the germination stage.The results showed that,com-pared to the control,all observed indicators decreased under 25%PEG stress,with coefficient of variation rang-ing from 20.853%to 97.876%.There was a significant correlation(P<0.05)among most experimental indi-cators.There were substantial differences in drought tolerance among materials,with the comprehensive drought tolerance coefficient ranging from 0.612 to 0.169 and the D-value ranging from 0.861 to 0.068.Clus-ter analysis classified the 100 t100 Bromus inermis germplasm resources into four groups:highly drought-resis-tant(14 materials),moderately drought-resistant(34 materials),weakly drought-resistant(45 materials),and drought-sensitive(7 materials).This study identified drought-resistant germplasm such as W1Z622,W1Z627,and W1Z595.The research provides high-quality materials and theoretical support for drought-resis-tant breeding of B.inermis.关键词
无芒雀麦/种子萌发/耐旱性/综合评价/聚类分析Key words
Bromus inermis/Seed germination/Drought tolerance/Comprehensive evaluation/Cluster analysis分类
农业科技引用本文复制引用
黄梦琪,李陈建,王玉祥,路璐,王清屿,蒋优,童爱香..无芒雀麦种质材料萌发期耐旱性综合评价[J].草地学报,2026,34(5):1677-1690,14.基金项目
财政部和农业农村部:国家现代农业产业技术体系牧草产业技术体系(CARS-34),新疆维吾尔自治区饲草产业技术体系(XJARS-13-04),第九师草原野生优良牧草选育研究项目(2023JS006)共同资助 （CARS-34）
