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《Acta Agrestia Sinica》 2009-03
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Morphological Differentiation and Taxonomic Module Construction for Elymus L. Plants

YAN Xue-bing1,WANG Kun2,WANG Cheng-zhang1,GUO Yu-xia1,ZHOU He2*(1.College of Animal and Veterinary Science,Henan Agricultural University,Zhengzhou,Henan Province 450002,China; 2.Institute of Grassland Sciences,China Agricultural University,Beijing 100193,China)  
Morphology is a common method in taxonomy and the valuable morphological traits are important because of the variability of traits and the difficulty in application.Elymus L.species,widely distributed in China,show great variance in morphological traits and reflect the taxonomical dilemma of Poaceae plants.In order to screen the valuable morphological traits,twenty-eight morphological indexes were examined in this study for forty populations of nine Elymus species from China according to the demand of lower differentiation within species than between species using unweighted pair group method with arithmetic average(UPGMA).Fourteen valuable traits were suggested to be applied to the taxonomy of Elymus species based on the clustering,principal component analysis,and correlation significance test(NTSYS-PC software).
【Fund】: 国家自然科学基金(30871531);; 青海省重大科技攻关(21031423)
【CateGory Index】: S54
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