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《Acta Agrestia Sinica》 2005-02
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Morphological Diversities of the Different Species of Elymus spp and their Principal Component Analysis

YAN Xue-bing~(1,2), ZHOU He~(*1), WANG Kun~1, GUO Yu-xia~3(1.Institute of Grassland Science, China Agricultural University, Beijing 100094,China;2. Zhengzhou College of Animal Husbandry, Zhengzhou, Henan 450008, China;3.School of Animal Science and Veterinary of Henan Agricultural University, Zhengzhou, Henan 450002, China)  
The statistical methods of cluster analysis and the Principal Component Analysis (PCA) were used to study 28 morphological characteristics from 40 populations of 9 species of Elymus spp in China. The results showed that 40 populations could be divided into two groups at 0.78 coefficient of genetic distance. One group mainly consisted of the materials of erect ears, the other nutant ears. The populations within each of 9 E.species could be clustered and related to their geographical origin. There were greater variation among E.dahuricus、E.cylindricus and E.purpuraristatus, but distinct taxonomic character between E.nutans and E.sibiricus. Seventeen eigenvectors about the utilization and taxonomic character, was accounted for more than 85% of the total variation, and divided into 10 groups based on their contributed variation. The morphological characteristics of the Elymus spp consisted of the single plant weight, single ear weight, tiller number, reproduction shoot length, distance between boot leaf and ear, ear color, spikelet length, lemma, awn length, spikelet width, ear width, growth rate during seedling stage, glume width, plant villus grade, growth rate from seedling to tiller, leaf color and plant height.
【Fund】: 青海省重大科技攻关项目“青南适用牧草品种选育”资助
【CateGory Index】: S543.9
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