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Adaptive Diversification (MPB-48)$
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Michael Doebeli

Print publication date: 2011

Print ISBN-13: 9780691128931

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691128931.001.0001

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Evolutionary Branching in a Classical Model for Sympatric Speciation

Evolutionary Branching in a Classical Model for Sympatric Speciation

Chapter:
(p.9) Chapter Two Evolutionary Branching in a Classical Model for Sympatric Speciation
Source:
Adaptive Diversification (MPB-48)
Author(s):

Michael Doebeli

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691128931.003.0002

This chapter begins by considering the Maynard Smith model. Much of this work concentrated on the genetic mechanisms for assortative mating and reproductive isolation, based on the assumption that the underlying niche ecology would generate disruptive selection. However, understanding the conditions under which disruptive selection arises in the first place is equally important, and indeed necessary for assessing whether diversification is a general outcome in the Maynard Smith model. The chapter then shows that disruptive selection and polymorphism are scenarios that occur generically, that is, for a wide range of parameters, in a classical and widely used speciation model. It also provides an introduction to some of the basic concepts of adaptive dynamics theory.

Keywords:   Maynard Smith model, assortative mating, reproductive isolation, niche ecology, disruptive selection, diversification, polymorphism, speciation model, adaptive dynamics theory

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