中国草地学报2026，Vol.48Issue(8)：1-14,14.DOI:10.16742/j.zgcdxb.20260042
牧草型苇状羊茅种质抗旱性评价研究
Evaluation of Drought Tolerance of Forage-Type Festuca arundinacea Germplasm
摘要
Abstract
This study aimed to identify drought-tolerant resources from wild germplasm of tall fescue(Festuca arundinacea).Four accessions(three wild and one cultivated)previously selected from over 300 wild germplasm accessions,together with the forage-type check cultivar 'Fawn'(control),were subjected to two water treatments:normal water supply(70%-80%of field capacity)and drought stress(30%-40%of field capacity).The results showed that significant differences in drought tolerance existed among the germplasm accessions at the seedling stage,with the membership function U values ranking as follows:CF017317(0.823)>Fawn(0.658)>CF017326(0.646)>CF017267(0.423)>CF017242(0.360).Analy-sis of the physiological mechanisms underlying drought tolerance revealed that CF017317 maintained a high net photosynthetic rate at the late stress stage(21 d)and balanced antioxidant enzyme activities,indicating a drought tolerance strategy involving synergistic regulation of osmotic adjustment,photosynthetic stabil-ity,and antioxidant defense,with CF017317 showing the best overall drought tolerance.The accession CF017317,which exhibited the strongest overall drought tolerance,is a high-quality breeding material for developing new drought-tolerant forage varieties of tall fescue.关键词
苇状羊茅/干旱胁迫/抗旱性/种质资源/综合评价Key words
Tall fescue/Drought stress/Drought tolerance/Germplasm resources/Comprehensive evaluation分类
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苏丹,陈飞,刘牧野,王子玥,周艳萍,刘芳,常智慧..牧草型苇状羊茅种质抗旱性评价研究[J].中国草地学报,2026,48(8):1-14,14.基金项目
青藏高原及南方山地丘陵草原区乡土草种种质资源调查项目(2024FY100303) （2024FY100303）
