两种竞争果蝇物种竞争能力进化的替代途径

ALTERNATIVE ROUTES TO THE EVOLUTION OF COMPETITIVE ABILITY IN TWO COMPETING SPECIES OF DROSOPHILA.

作者信息

Joshi Amitabh, Thompson John N

机构信息

Department of Genetics and Cell Biology, Washington State University, Pullman, Washington, 99164.

Departments of Zoology and Botany, Washington State University, Pullman, Washington, 99164.

出版信息

Evolution. 1995 Aug;49(4):616-625. doi: 10.1111/j.1558-5646.1995.tb02298.x.

DOI:10.1111/j.1558-5646.1995.tb02298.x

PMID:28565141

Abstract

The evolution of components of interspecific competitive ability was examined in three different environments for three replicate pairs of Drosophila melanogaster and D. simulans populations. Populations evolved enhanced competitive ability in three ways: (1) increased effectiveness at reducing the numbers of the competitor species; (2) increased resistance to the inhibitory effects of the competitor species; or (3) a combination of the two. Considerable variation was seen in the evolutionary outcomes of competition among environments, and also among replicate populations within environments. Significant replicate-by-environment interactions were also observed. The results suggest that the evolutionary routes to the evolution of enhanced competitive abilities can potentially differ among subdivided populations, creating a geographic mosaic of outcomes.

摘要

在三种不同环境中，对三对重复的黑腹果蝇和拟暗果蝇种群的种间竞争能力组成部分的进化进行了研究。种群通过三种方式进化出增强的竞争能力：（1）在减少竞争物种数量方面提高有效性；（2）增强对竞争物种抑制作用的抗性；或（3）两者结合。在不同环境间以及同一环境内的重复种群间，竞争的进化结果存在相当大的差异。还观察到显著的重复与环境的交互作用。结果表明，在细分种群中，增强竞争能力进化的途径可能不同，从而形成一个结果的地理镶嵌体。