@article{barton2010natural,
abstract = {If distinct biological species are to coexist in sympatry, they must be reproductively isolated and must exploit different limiting resources. A two-niche Levene model is analysed, in which habitat preference and survival depend on underlying additive traits. The population genetics of preference and viability are equivalent. However, there is a linear trade-off between the chances of settling in either niche, whereas viabilities may be constrained arbitrarily. With a convex trade-off, a sexual population evolves a single generalist genotype, whereas with a concave trade-off, disruptive selection favours maximal variance. A pure habitat preference evolves to global linkage equilibrium if mating occurs in a single pool, but remarkably, evolves to pairwise linkage equilibrium within niches if mating is within those niches{\textemdash}independent of the genetics. With a concave trade-off, the population shifts sharply between a unimodal distribution with high gene flow and a bimodal distribution with strong isolation, as the underlying genetic variance increases. However, these alternative states are only simultaneously stable for a narrow parameter range. A sharp threshold is only seen if survival in the {\textquoteleft}wrong{\textquoteright} niche is low; otherwise, strong isolation is impossible. Gene flow from divergent demes makes speciation much easier in parapatry than in sympatry. {\textcopyright} 2010 The Royal Society},
added-at = {2017-12-04T20:55:32.000+0100},
author = {Barton, N. H.},
biburl = {https://www.bibsonomy.org/bibtex/27f511ca965578b2c9353d19b98ea5d93/peter.ralph},
doi = {10.1098/rstb.2010.0001},
eprint = {http://rstb.royalsocietypublishing.org/content/365/1547/1825.full.pdf},
interhash = {ee1905be853112beb2401e102bf2cf1e},
intrahash = {7f511ca965578b2c9353d19b98ea5d93},
issn = {0962-8436},
journal = {Philosophical Transactions of the Royal Society of London B: Biological Sciences},
keywords = {Dobzhansky-Muller Levene_model evolutionary_stable_strategies local_adaptation speciation},
number = 1547,
pages = {1825--1840},
publisher = {The Royal Society},
timestamp = {2017-12-04T20:55:32.000+0100},
title = {What role does natural selection play in speciation?},
url = {http://rstb.royalsocietypublishing.org/content/365/1547/1825},
volume = 365,
year = 2010
}