通过花粉在人工种植的麝香飞廉（Carduus nutans L.）种群中实现的基因流动

REALIZED GENE FLOW VIA POLLEN IN ARTIFICIAL POPULATIONS OF MUSK THISTLE, CARDUUS NUTANS L.

作者信息

Smyth C A, Hamrick J L

机构信息

Departments of Botany and Systematics & Ecology, University of Kansas, Lawrence, KS, 66045.

出版信息

Evolution. 1987 May;41(3):613-619. doi: 10.1111/j.1558-5646.1987.tb05832.x.

DOI:10.1111/j.1558-5646.1987.tb05832.x

PMID:28563801

Abstract

Realized gene flow via pollen was measured in four adjacent, artificial populations of musk thistle, Carduus nutans L. by observing the distribution of electrophoretic markers at two allozyme loci. Realized gene movement declined exponentially with distance. Dispersal distances of the marker alleles averaged 5.0 m. Estimates of effective neighborhood sizes based on the movement of these genetic markers ranged from 126 to 378 individuals. When measures of seed movement were included, estimates of effective population sizes range from 1,281 to 3,844 individuals. It is, therefore, unlikely that chance effects play a major role in shaping the genetic structure of well-established musk thistle populations.

摘要

通过观察两个等位酶位点上电泳标记的分布，在四个相邻的人工种植的飞廉（Carduus nutans L.）种群中测量了经由花粉实现的基因流动。实现的基因移动随距离呈指数下降。标记等位基因的扩散距离平均为5.0米。基于这些遗传标记的移动对有效邻域大小的估计范围为126至378个个体。当纳入种子移动的测量时，有效种群大小的估计范围为1281至3844个个体。因此，偶然性效应在塑造成熟的飞廉种群的遗传结构中不太可能起主要作用。