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《Acta Agrestia Sinica》 2009-04
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Comparative Studies on the Morphological Characteristics of Diploid and Tetraploid of Wild Sickle Alfalfa

WANG Hong-mei,WANG Jun-jie*,YUN Jin-feng,LIU Ya-ling,GAO Xue-qin(Inner Mongolia Engineering and Technique Center for Forage Breeding and Reproduction,College of Ecology and Environmental Science,Inner Mongolia Agricultural University,Huhhot,Inner Mongolia Autonomous Region 010019,China)  
Nineteen morphological characters were compared between diploid and tetraploid plants of wild sickle alfalfa(Medicago falcata L.) collected from Xinjiang Uygur Autonomous Region,Inner Mongolia Autonomous Region,and Russia.Results show that there were significant differences in morphological characters between the two plants.Differences in vegetative organs were more obvious than those in reproductive organs.Diploid plants had orange colored flowers,purple-green stems,oblanceolate or linear leaves,dense hairs on both sides of leaves;tetraploid plants had yellow flowers,green stems,oblanceolate or obovate leaves,smooth leaf surface and sparse hairs on the underside of leaves.In comparison with diploid plants,tetraploid plants appeared as more vigorous growth.The two types of plants could be distinguished easily by cluster analysis based on six morphological characters.Plants of the tetraploid group could be further classified into different categories based on the habitat characters.Morphological differences between different ploidy groups were more obvious than those among the plants of same ploidy groups from different habitats.
【Fund】: 内蒙古科技厅草业专项(20071923);; 国家植物种质资源共享平台建设项目(2007DKA21007-3)
【CateGory Index】: S541.9
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