Interactions among quantitative traits in the course of sympatric speciation Journal Article


Author(s): Kondrashov, Alexey S; Kondrashov, Fyodor A
Article Title: Interactions among quantitative traits in the course of sympatric speciation
Affiliation
Abstract: Sympatric speciation, the origin of two or more species from a single local population, has almost certainly been involved in formation of several species flocks, and may be fairly common in nature. The most straightforward scenario for sympatric speciation requires disruptive selection favouring two substantially different phenotypes, and consists of the evolution of reproductive isolation between them followed by the elimination of all intermediate phenotypes. Here we use the hypergeometric phenotypic model to show that sympatric speciation is possible even when fitness and mate choice depend on different quantitative traits, so that speciation must involve formation of covariance between these traits. The increase in the number of variable loci affecting fitness facilitates sympatric speciation, whereas the increase in the number of variable loci affecting mate choice has the opposite effect. These predictions may enable more cases of sympatric speciation to be identified.
Journal Title: Nature
Volume: 400
Issue 6742
ISSN: 0028-0836
Publisher: Nature Publishing Group  
Date Published: 1999-07-01
Start Page: 351
End Page: 354
DOI: 10.1038/22514
Open access: no