中国草地学报2025，Vol.47Issue(6)：66-77,12.DOI:10.16742/j.zgcdxb.20240301
12份紫花苜蓿品种(品系)苗期抗旱性综合评价
Comprehensive Evaluation of Drought Resistance of 12 Alfalfa Varieties(Strains)at Seedling Stage
摘要
Abstract
In order to explore the effects of drought stress on agronomic traits of different alfalfa variet-ies(strains),12 alfalfa varieties(strains)were used as materials in this study,pot experiments were car-ried out in greenhouse and two treatments of drought stress and rewatering were conducted at seedling stage,the agronomic traits(plant height,aboveground fresh and dry weight,root length,root fresh and dry weight,root shoot ratio,stem diameter,root diameter,branch number)of alfalfa materials after treat-ment were determined,and through the comprehensive drought resistance coefficient,principal component comprehensive evaluation,grey correlation degree and drought resistance index for comprehensive evalua-tion of drought resistance ability.The results showed that the new strain 1 had the highest drought resis-tance coefficient in aboveground fresh weight,aboveground dry weight,plant height,root length and branch number,the drought resistance coefficient of stem diameter of new strain 2,the drought resistance coefficient of root diameter of Gannong No.7 and drought resistance coefficient of root fresh weight and root shoot ratio of Zhongtian No.3 were the highest,the drought resistance coefficient of aboveground fresh weight,aboveground dry weight,root fresh weight,root dry weight,plant height,root length and branch number of Zhongmu No.3 was the lowest,the drought resistance coefficient of stem diameter in Gannong No.3 and drought resistance coefficient of root shoot ratio in Zhongtian No.2 were the smallest.The comprehensive drought resistance coefficient,principal component comprehensive evaluation,grey correlation degree and cluster analysis showed that the new strain 1,Zhongtian No.3 and Zhongmu No.1 had strong drought resistance.The drought-resistant germplasms identified by the Drought Resistance Index(DRI)method were new strain 1,Zhongtian No.3,new strain 3,Zhongmu No.1,and Gannong No.7,all of which displayed DRIs greater than 1.Comprehensive evaluation across multiple methods revealed that new strain 1,Zhongtian No.3,and Zhongmu No.1 possessed the strongest drought resistance.关键词
紫花苜蓿/苗期/抗旱能力/主成分分析/灰色关联度/综合评价Key words
Alfalfa/Seedling stage/Drought resistance/Grey correlation analysis/Principal compo-nent analysis/Comprehensive evaluation分类
农业科技引用本文复制引用
吴芳,崔光欣,张静,杨红善,朱新强,段慧荣,李玉杰,张瑞欣,路远,张茜..12份紫花苜蓿品种(品系)苗期抗旱性综合评价[J].中国草地学报,2025,47(6):66-77,12.基金项目
内蒙古自治区"揭榜挂帅"项目专题(2022JBGS0016-0104) （2022JBGS0016-0104）
甘肃省科技计划项目"甘肃重要乡土草及牧草种质创新与品种选育"(23ZDKA013) （23ZDKA013）
新疆维吾尔自治区科技支疆项目计划(2024E-02024) （2024E-02024）
中国农业科学院基本科研业务费专项(161032202-3017) （161032202-3017）
