中性基因流跨越单基因座渐变群。

NEUTRAL GENE FLOW ACROSS SINGLE LOCUS CLINES.

作者信息

Gavrilets Sergey, Cruzan Mitchell B

机构信息

Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Tennessee, 37996-1610.

Department of Mathematics, University of Tennessee, Knoxville, Tennessee, 37996-1610.

出版信息

Evolution. 1998 Oct;52(5):1277-1284. doi: 10.1111/j.1558-5646.1998.tb02009.x.

DOI:10.1111/j.1558-5646.1998.tb02009.x

PMID:28565387

Abstract

We study the strength of the genetic barrier to neutral gene flow in a general one-locus, two-allele model that includes viability selection as well as fertility selection and premating isolation. We have separately considered adult migration and pollen migration. Our theoretical results suggest that selection against hybrid formation in the form of fertility selection or assortative mating is more effective in preventing introgression of neutral alleles than is reduction in hybrid viability. We argue that in experimental studies of introgression testing of F hybrids is as important as testing of parental forms. To illustrate the utility of this approach, we estimate the strength of the barrier to neutral gene flow between Piriqueta caroliniana and P. viridis, between Iris hexagona and I. fulva, and between Chorthippus brunneus and C. biguttulus.

摘要

我们在一个通用的单基因座、双等位基因模型中研究中性基因流动的遗传屏障强度，该模型包括生存力选择、育性选择和交配前隔离。我们分别考虑了成体迁移和花粉迁移。我们的理论结果表明，以育性选择或选型交配形式对杂种形成的选择，在防止中性等位基因渗入方面比降低杂种生存力更有效。我们认为，在基因渗入的实验研究中，对F杂种的测试与对亲本形式的测试同样重要。为了说明这种方法的实用性，我们估计了卡罗来纳叶下珠和绿叶下珠之间、六棱鸢尾和黄鸢尾之间以及褐胫牧草蝗和双斑牧草蝗之间中性基因流动的屏障强度。