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植物研究 ›› 1987, Vol. 7 ›› Issue (2): 81-94.

• 论文 • 上一篇    下一篇

马银花若干地方性群体内和群体间的变异式样的分析

徐炳声1, 顾德兴2   

  1. 1. 复旦大学生物系, 上海;
    2. 南京农业大学大学系, 江苏
  • 出版日期:1987-06-15 发布日期:2016-06-13

AN ANALYSIS OF THE VARIATION PATTERNS OF INFRA-AND INTER-POPULATIONS OF RHODODENDRON OVATUM

Hsu Ping-sheng1, Gu De-xing2   

  1. 1. Department of Biology, Fudan University, Shanghai;
    2. Department of Agronomy, Nanjing Agricultural University, Jiangsu
  • Online:1987-06-15 Published:2016-06-13

摘要: 本文以马银花(Phododendron ovatum)的属于六个省和自治区的七个地方性群体为对象,对群体内和鲜体间的变异式样进行了定量分析,以便在群体水平上探测该种种内之具有规律性的变异及其与地理分布的关系。根据所测定的十个单个性状和相关性状的数据绘制了以群体为单位的矩形图、多角形图和散点图。结果发现:(1)四川重庆的群体不论在叶顶端凹缺的深度和宽度(两者多少相关)上,还是在萼片形状上,都呈现与华东诸省明显不同的变异式样;(2)广西的群体的萼片缘毛数明显高于其他群体,(3)萼片的形状与其缘毛数分别与地理分布相关,不能作为分种的依据。

Abstract: Our previous paper[1] has been concerned with the infraspe-cific variation of the widespread Rhododendron ovatum (Lindl.)Planch. based upon herbarium materials. We have shown that the species varies considerably in such characters as the shape of leaves, with or without an apical notch, margins of calyx-lobes glabrous or with glandular hairs, etc. The present paper deals with a quantitative analysis of the same morphological characters previously studied of a number of local populations of R. ovatum in order to shed some light on the infra-and inter-population variation patterns of the species. Population samplings were carried out during 1983-1984.The sites of populations were as follows:(1) Hangzhou, Zhe-jiang, (2) Huangshan, Anhui, (3) Lushan, Jiangxi, (4) Chong-an, Fujian, (5) Xingan, Guangxi, (6) Chongqing, Sichuan, and(7) Zhongxian, Sichuan (Fig. 1). As a result of a biometrical analysis of the histograms (Fig. 2), polygonal graphs (Fig. 3-4) and scatter diagrams (Fig. 5), we have found that:1. The depth and width of the apical notches of leaves vary at random as a whole, but the variables of Population No.6 are remarkably less than those of the other populations, and the two characters show more or less a correlation in variation. 2. The shape of calyx-lobes of Population No. 6 tends to be broadest below the middle, while those of the other populations are principally broadest in or above the middle. 3. Any of these populations shows a great variability in the amount of marginal hairs of the calyx-lobes, from entirely gla-brous to possessing very many hairs. But the gaverage amount of marginal hairs of Populations No. 5 is distinctly greater than those of the other populations. In general, there may be two trends of topoclinal variation among the populations examined, from those of the north-eas-tern sites to the south and south-western extremes with regard to (a) a general shift of the shape of calyx-lobes from ovate or broadly ovate to elliptic or obovate, and (b) the increase of average amount of marginal hairs of calyx-lobes per population.But the factors besides climate give rise to these variationaltrends deserve further study. Since R. xinganense G. L. Li and R. cvatum are morphologic-ally inseparable, the former is therefore reduced to be a synonym of the latter.