草地学报2026，Vol.34Issue(5)：1610-1621,12.DOI:10.11733/j.issn.1007-0435.2026.05.005
101份无芒雀麦苗期耐旱性评价
Evaluation of Drought Tolerance of 101 Accessions of Bromus inermis at the Seedling Stage
摘要
Abstract
To determine the drought-tolerant capacity of bromus and to screen early drought-tolerant bromus seedlings,this study measured the adaptive response of 101 accessions of B.inermis at the seedling stage to drought stress.The morphological and physiological changes of the plants including roots were analyzed,and 17 growth indexes related to drought tolerance were determined.The drought tolerance of the seedlings was evaluated and screened by comprehensive evaluation,correlation analysis,principle component analysis,mem-bership function and cluster analysis.The results showed that plant height,average root diameter,fresh weight above ground,total root volume,root surface area,root projected area,fresh weight below ground,total pri-mary root length,dry-weight root aboveground ratio,maximum primary root long,fresh-weight root aboveg-round ratio and aboveground dry weight can be important indicators for the identification of drought tolerance in the seedlings of bromus.101 bromus materials were divided into 4 different drought-tolerant grades by cluster analysis.There were 10 germplasm materials in class I with D value ranging from 2.00 to 2.55,which were highly drought-tolerant materials.There were 38 germplasm materials in Class II with D value ranging from 1.27 to 1.81,belonging to moderate drought tolerance.There were 42 germplasm materials in Class III with D value ranging from 0.77 to 1.25,belonging to low drought tolerance.There were 11 germplasm materials in Class IV,the D value ranged from 0.37 to 0.73,belonging to drought sensitive materials.The drought-resis-tant germplasm W1Z755,W1Z770 and W1Z696 were selected.The drought-sensitive materials were W1Z626,W1Z587 and W1Z763.This study can provide a theoretical basis and a material basis for the drought resistance evaluation of bromus seedlings and the selection of new varieties.关键词
无芒雀麦/苗期/干旱胁迫/耐旱指标Key words
Bromus inermis/Seedling stage/Drought stress/Drought tolerance index分类
农业科技引用本文复制引用
王清屿,李陈建,黄梦琪,路璐,蒋优,王玉祥,童爱香,张英,靳瑰丽..101份无芒雀麦苗期耐旱性评价[J].草地学报,2026,34(5):1610-1621,12.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) （CARS-34）
新疆维吾尔族自治区优质饲草产业技术体系(XJARS-13-04) （XJARS-13-04）
第九师草原野生优良牧草选育研究项目(2023JS006)资助 （2023JS006）
