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《Acta Agrestia Sinica》 2010-03
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Study on Morphological Diversity of Cynodon arcuatus in Hainan

HUANG Chun-qiong1,2,LIU Guo-dao1 (1.Tropical Crop Genetic Resources Institute,Chinese Academy of Tropical Agricultural Sciences;Key Laboratory for Tropical Crop Germplasm Utilization,Ministry of Agriculture,Danzhou,Hainan Province 571737,China;2.College of Agronomy,Hainan University,Danzhou,Hainan Province 571737,China)  
Morphological diversity in 19 accessions of Cynodon arcuatus J.S.Presl ex Presl was estimated through nineteen morphological characteristics with numerical analyses.The aim of this study was to evaluate the genetic diversity of C.arcuatus accessions originated from different regions of Hainan Island using morphological markers and the information from this study would be beneficial for the breeding of C.arcuatus.The following results were obtained: Abundant morphological variation existed in accessions of C.arcuatus.The largest variation was found in leaf hair,sward height,anther color,leaf height of upright stem and stolon,followed by spikelet number,inflorescence length,sward density,leaf width of upright stem and stolon,internode length,internode diameter,and inflorescence branch number,and the least variation was found in colors of stem,leaf,spikelet,and stigma.There existed distinct and significant correlations among some of morphological characters of C.arcuatus accessions in Hainan.With sward height increasing,C.arcuatus became denser,longer leaves,and thicker stolons.The accessions were clustered into three major morphological types using the unweighted pair-group method with arithmetic averages(UPGMA) as fine leaf type,common leaf type,and wide leaf type.
【Fund】: 热带牧草种质资源保护项目;; 国家科技支撑计划项目(No.2008BADB3B08);; 国家"973"计划项目(No.2007CB108903);; 中国热带农业科学院热带作物品种资源研究所研究生基金项目(No.YJS-2008-B002)共同资助
【CateGory Index】: S688.4
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