柱花草种质植物学特征比较分析  

Variances of Botanical Morphological Characteristics of Stylosanthes Germplasms

作　　者：唐燕琼[1,2] 李瑞梅[1] 符少萍[1] 郭建春[1] 

机构地区：[1]中国热带农业科学院热带生物技术研究所,海南海口571101 [2]海南大学农学院,海南儋州571737

出　　处：《江西农业大学学报》2011年第4期629-635,共7页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家"973"计划项目(2007CB108903);国家牧草产业技术体系建设专项资金

摘　　要：为利用植物形态学研究柱花草种质资源的遗传多样性,筛选优良柱花草种质,笔者对48份柱花草种质的植物学特征进行了观测比较并进行了聚类分析。结果表明48份种质(品种)中有3份是半灌木,2份种质属二年生草本,其余42份属多年生草本植物;绝大多数(35份)种质茎的生长习性是直立型或斜升型,只有5种是匍匐型;只有1份为白花,其它47份种质为深浅不同的黄色花。柱花草的植物学特征存在广泛变异,其变异系数由大到小依次为:自然株高(24.63%)、绝对株高(22.29%)、长/宽(16.00%)、叶宽(15.66%)、叶长(12.92%)、种子千粒重(12.22%)。对于48份种质从13个植物学特性指标进行聚类分析,将48份种质分为两大类:圭亚那种柱花草种和非圭亚那种柱花草种。To study the genetic diversity of Stylosanthes germplasms by plant morphology and select fine germplasm,morphological characteristics of 48 Stylosanthes germplasms were observed and clustering analysis was conducted.The results indicated that,of all the 48 germplasms,3 were subshrub,2 were biennial herbs,and the others were perennial herbs.The types of stem growth of most germplasms（35） were erective or slanting,5 were procumbent or spreading.Only 1 had white flowers,the other 47 had yellow flowers of different shades.Abundant morphological variation existed in Stylosanthes.Their coefficients of variation were ranked as follows： natural stem length（24.63%）,absolute stem length（22.29%）,length/width（16.00%）,leaf width（15.66%）,leaf length（12.92%）,1000-seed weight（12.22%）.Based on 13 morphological characteristics,the germplasms of Stylosanthes were clustered into two morphological types,S.guianensis and out of S.guianensis.

关 键 词：柱花草 种质 形态特征 

分 类 号：S541.9[农业科学—作物学]