21份杂花苜蓿种质萌发期抗旱性评价  

Evaluation of Drought Resistance of 21 Variegated Alfalfa Cultivars during Germination

作　　者：张辰昊 热孜亚·艾力 晁跃辉[1] 申玉华 张铁军 ZHANG Chen-hao;Reziyaaili;CHAO Yue-hui;SHEN Yu-hua;ZHANG Tie-jun(College of Grassland Science,Beijing Forestry University,Beijing 100083,China;College of Chemistry and Life Science,Chifeng University,Chifeng 024005,China)

机构地区：[1]北京林业大学草业与草原学院,北京100083 [2]赤峰学院化学与生命科学学院,内蒙古赤峰024005

出　　处：《中国草地学报》2022年第3期58-65,共8页Chinese Journal of Grassland

基　　金：北京林业大学大学生创新创业训练计划创新训练项目(2020-154);赤峰学院服务赤峰市经济社会发展应用项目(cfxyfc201858);国家自然科学基金资助项目(31772656)共同资助。

摘　　要：研究利用聚乙二醇溶液模拟干旱胁迫,以蒸馏水作为对照,测定21份杂花苜蓿种子萌发期的发芽势、发芽率、发芽指数和活力抗旱指数等8项指标,并采用模糊数学隶属法对杂花苜蓿种质资源进行抗旱性综合评价。研究表明,在PEG-6000模拟干旱胁迫下,21份杂花苜蓿种质资源的发芽率、发芽势和发芽指数均显著降低,分别下降62.0%、63.9%和85.9%;以萌发胁迫指数、萌发抗旱指数、相对发芽率和活力抗旱指数为评判指标,采用模糊数学隶属法对21份种质进行综合评价,编号为CF050047、CF050032、CF050038和CF0482914份杂花苜蓿种质资源抗旱性较强;6份杂花苜蓿种质资源为中等抗旱水平;11份杂花苜蓿种质资源抗旱性较弱。以上结果为选育杂花苜蓿抗旱新品种提供了理论依据和基础材料。This study measured eight vital seed germination indexes(germination potential,germination rate,germination index,vigor,drought resistance index,and so on)of 21 variegated alfalfa(M.varia M.media M.sativa×M.falcata)cultivars using polyethylene glycol(PEG-6000)solution to mimic the drought stress.The fuzzy mathematics membership method was applied to evaluate the drought resistance of all cultivars.The results showed that the germination rate,germination potential,and germination index of all 21 cultivars significantly decreased under simulated drought stress of PEG-6000,with an average decrease of 62.0%,63.9%,and 85.9%,respectively.The drought resistance indexes of all cultivars were evaluated by the fuzzy mathematics membership method,including germination stress index,germination drought resistance index,relative germination rate,and vitality index.Four(CF050047,CF050032,CF050038,and CF048291),6,and 11 cultivars exhibited strong,moderate,and weak drought resistance,respectively.This study provided the theoretical basis and materials for breeding new cultivars of variegated alfalfa with strong drought resistance.

关 键 词：杂花苜蓿 PEG-6000胁迫 种子萌发 抗旱性 

分 类 号：S541[农业科学—作物学]