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《Northern Horticulture》 2008-08
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Study on the Morphological Diversity of Wild Roegneria kamoji Germplasm from Sichuan and Chongqing Province

XIAO Su1,ZHANG Xin-quan1,MA Xiao1,ZHANG Jian-bo1,2,YI Yang-jie1,HUANG Lin-kai1(1.Department of Grassland,Sichuan Agricultural University,Ya'an,Sichuan 625014,China;2.Guizhou Institute of Prataculture,Dushan,Guizhou 558200,China)  
Genetic diversity of 26 accessions of Roegneria kamoji distributed in Sichuan and Chongqing province was studied in this paper.Twenty-four morphological traits were observed.The results showed that there was abundant genetic diversity among these accessions in morphological traits(H′=1.955).As for the genetic diversity index,it was mainly found within accessions(64.48%),while among accessions was 35.52 percent.To single accession,accession of Fengdu Xincheng was the highest diversity index(H′=1.382).Twenty-four wild accessions can be clustered into four groups,the findings implied that a correlation among the tested wild resources,geographical and ecological environment.Principal component analysis showed that internode length,upper glum length,the first lower palea spike length,spike length,leaf width,Lemma length and florets per spikelet number were important traits in explaining the morphological diversity of the region,which also supported cluster analysis results.Additionally,effective conservation and utilization of Roegneria kamoji were discussed in this paper.
【Fund】: 四川省科技厅“十一五”牧草育种攻关资助项目(02SG023-001)
【CateGory Index】: S543.202
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