不同大麦品种抗旱性鉴定指标的筛选与评价

Screening and Evaluation of Drought Resistance Indexes in Different Barley Varieties

为筛选大麦抗旱性鉴定指标,通过隶属函数法对15个大麦品种13个农艺、生理、产量和品质性状的综合抗旱性进行了鉴定和评价分析。结果表明,产量、单株分蘖数、穗长、单株粒数和穗粒数5个性状的抗旱权重值与品种抗旱相关性较大;而叶片SPAD值及籽粒水分、淀粉和粗纤维含量4个性状与抗旱相关性较小。按隶属函数综合D值将15份参试大麦品种划分为4类,其中,沪麦4号、晋大麦(啤)3号和鄂大麦9号抗旱性较好。与抗旱系数和抗旱指数相比,隶属函数法能更全面地评价大麦品种抗旱性,为大麦抗旱新品种或新种质鉴定提供了理论参考。

In order to identify the drought resistance of barley,taking 15 varieties mainly cultivated in southern Shanxi as materials,the traits of agricultural,economic,physiological and quality characters were analyzed by membership function method.The results showed that yield,tiller number,spike length,grain number per plant and grain number per spike were highly correlative with drought resistance of variety,while SPAD value and the contents of moisture,starch,crude fibre in grain were little correlative with drought resistance.According to the D value based on all 13 traits,15 varieties were divided into four types,and three varieties including Humai4,Jindamai3 and Edamai9 showed higher drought resistance than other varieties.Comparing with direct identification of drought resistance by drought resistance coefficient and drought resistance index,indirectly identification of drought resistance by membership function method could more comprehensively reflect the drought resistance of barley varieties,which provided the theoretical reference for the breeding of new barley variety and screening of germplasm.