作　　者： ; ; ; (张乃春）; (张明刚）;

机构地区： 中国林业科学研究院林业研究所

出　　处： 《中南林业科技大学学报》 2013年第10期19-24,共6页

摘　　要： 在贵州滇楸Catalpa duclouxii Dode.主要分布区收集了17个群体的花,对花枝长度、花朵数量、上下花萼长度及花冠(花径)大小等7个表型性状进行系统调查和遗传多样性分析。结果表明:花的表型性状在群体间和群体内均存在丰富的变异,7个性状的差异均达到极显著水平(P<0.01),平均变异系数为25.94%,变化幅度为7.85～47.17%,平均表型分化系数为27.95%(14.92～42.15%),群体内变异(72.05%)大于群体间变异(27.95%);花性状与经纬度、海拔呈显著、极显著相关;通过聚类分析17个群体划分为4个类。 The phenotypic variations of 17 populations of Catalpafargesii f. duclouxii, theirs 7 phenotypic traits including flowers branch length, upper calyx length, lower calyx length, corolla and flower diameter were investigated. The results show that there existed notable variations of phenotypic characters of flowers within and among the groups, the differences of the 7 phenotypic traits reached an extremely significant level （P 〈 0.01）, the mean variation coefficient was 25.94%, the amplitude of variations of each characteristic of flowers ranged from 7.85%-47.17%, the mean phenotypic differentiation coefficients was 27.95% （ 14.92- 42.15%） , the variation within seventeen populations （72.05%） was larger than that of among populations （27.95 % ）; the flower traits were highly significantly related with the latitude and longitude, and extreme significantly with the altitude. According to the UPGMA cluster analysis, the 17 populations of C. fargesii f. duclouxii were divided into four groups.

关 键 词： 滇楸 花 形态特征 表型性状

领　　域： [农业科学]