Acta Agrestia Sinica

›› 2009, Vol. 17 ›› Issue (6): 807-812.DOI: 10.11733/j.issn.1007-0435.2009.06.021

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Study on Comprehensive Evaluation of Drought Resistance of Medicago stiva L. Germplasm at Seedling Stage

LI Yuan1,2, LIU Gui-bo2, GAO Hong-wen1, WANG Zan1, ZHAO Hai-ming2, XIE Nan2, WANG Yan-hui3   

  1. 1. Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing 100193, China;
    2. Dryland Farming Institute, Hebei Academy of Agricultural and Forestry Sciences/Key Laboratory for Crop Drought Resistance of Hebei Province, Hengshui, Hebei Province 053000, China;
    3. College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu Province 730020, China
  • Received:2009-03-30 Revised:2009-06-01 Online:2009-12-15 Published:2009-12-15

紫花苜蓿种质苗期抗旱性综合评价研究

李源1,2, 刘贵波2, 高洪文1, 王赞1, 赵海明2, 谢楠2, 王艳慧3   

  1. 1. 中国农业科学院北京畜牧兽医研究所, 北京, 100193;
    2. 河北省农林科学院旱作农业研究所, 河北省农作物抗旱研究重点实验室, 河北, 衡水, 053000;
    3. 兰州大学草地农业科技学院, 甘肃, 兰州, 730020
  • 通讯作者: 高洪文,E-mail:gaohongwen@263.net
  • 作者简介:李源(1981- ),男,山西翼城人,助研,硕士研究生,研究方向为牧草种质资源及育种研究,E-mail: gsly868@163.com
  • 基金资助:
    十一五国家科技支撑(2007BAD56B02);中国农业科学院基本科研业务费(Ywf-td-3)

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Abstract: The drought resistance of 18 alfalfa germplasms at the seedling stage was evaluated under soil drought stress in the green house.The difference among three comprehensive evaluation methods,i.e.cluster analysis,grading method,and standard deviation coefficient allocation weighted method,was compared based on the measurements of morphological indices including survival rate,plant height,aboveground biomass,underground biomass,root to shoot ratio,and root length and meanwhile the strong drought resistance materials were screened.The results show that the drought resistance of 18 alfalfa germplasms from strong to weak was as follows: M7 > M8 > M3 > M10 > M9 > M4 > M11 > M2 > M12 > 810 > M6 > M14 > M1 > CK > M15 > M16 > M13 > M17 > M5 according to the standard deviation coefficient allocation weighted method.This method not only considered the allocation weight of different indices but also evaluated the drought resistance of each material.

Key words: Medicago stiva L., Germplasm, Seedling stage, Drought resistance, Comprehensive evaluation

摘要： 为筛选优异的抗旱种质资料,采用室内盆栽法,对来自俄罗斯的18份紫花苜蓿(Medicago sativa L.)种质资源的抗旱性进行研究.在日光温室模拟干旱胁迫条件下,通过测定存活率、株高、地上生物量、地下生物量、根冠比、根系长度等形态指标,比较聚类分析法、抗旱性等级评价赋分法、标准差系数赋予权重法三种综合评价方法的差异,同时筛选抗旱种质材料.结果表明:标准差系数赋予权重法得出供试材料抗旱性强弱为:M7>M8>M3>M10>M9>M4>M11>M2>M12>810>M>M14>M1>CK>M15>M1>M13>M17>M5,评价结果与材料实际观测基本一致.标准差系数赋予权重法不但考虑不同指标的权重,还定量地鉴定每份材料的抗旱能力,比聚类分析法和抗旱性等级评价赋分法的结果更具科学合理性.

关键词: 紫花苜蓿, 种质资源, 苗期, 抗旱性, 综合评价

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