紫花苜蓿苗期抗旱性鉴定指标筛选及综合评价  

Study on screening of drought resistance assessment indices and comprehensive evaluation of alfalfas during seedling stage

作　　者：翟春梅[1,2] 王赞[1] 邓波[2] 李源[3] 高洪文[1] 

机构地区：[1]中国农业科学院北京畜牧兽医研究所,北京100094 [2]吉林农业大学动物科技学院,吉林长春130118 [3]河北省农林科学院旱作农业研究所,河北衡水053000

出　　处：《干旱地区农业研究》2008年第6期167-172,共6页Agricultural Research in the Arid Areas

基　　金：中国农科院基本科研业务费(ywf-td-3);科技部国际合作重点“新型蛋白牧草资源引进、评价鉴定及开发利用研究”(2005DFBA0007)

摘　　要：以21份紫花苜蓿种质为研究材料,通过室内盆栽试验,在苗期反复干旱胁迫下,测定了与抗旱性有关的8项形态指标,通过主成分分析法筛选出了叶片长度、叶片宽度、根冠比胁迫指数、地下生物量胁迫指数、干物质含量胁迫指数等5个与存活率密切相关的指标作为紫花苜蓿苗期抗旱性鉴定的指标;并运用隶属函数法对21份紫花苜蓿种质进行综合评价,确定了苗期抗旱性较强的种质为:ZXY04P-44、ZXY04P-10、ZXY04P-32。Eight traits indices were used for the evaluation of drought resistance of alfalfa germplasms in green house during seedling stage under repeated drought stress. Through principal components analysis, five indices, leaf length, leaf width, root/shoot stress index, underground biomass stress index and dry weight con- tent stress index, were screened, which had close relation to the survival rates under repeated drought condition during seedling stage. With the membership function method, the drought resistance of 21 accessions of alfalfa germplasms was evaluated. Based on the value of comprehensive evaluation, the germplasms with stronger drought resistance in seeding stage were：ZXY04P- 44, ZXY04P- 10 and ZXY04P- 32.

关 键 词：紫花苜蓿 苗期 抗旱性 鉴定指标 隶属函数法 综合评价 

分 类 号：S551.7[农业科学—作物学]