English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Evolution of mating types in finite populations: the precarious advantage of being rare

MPS-Authors
/persons/resource/persons211426

Czuppon,  Peter
Department Evolutionary Theory, Max Planck Institute for Evolutionary Biology, Max Planck Society;

/persons/resource/persons56565

Rogers,  David W.
Department Microbial Population Biology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

External Ressource
Fulltext (public)
Supplementary Material (public)
There is no public supplementary material available
Citation

Czuppon, P., & Rogers, D. W. (2019). Evolution of mating types in finite populations: the precarious advantage of being rare. Journal of Evolutionary Biology, 32(11), 1290-1299. doi:10.1111/jeb.13528.


Cite as: http://hdl.handle.net/21.11116/0000-0003-7013-9
Abstract
Sexually reproducing populations with self-incompatibility bear the cost of limiting potential mates to individuals of a different type. Rare mating types escape this cost since they are unlikely to encounter incompatible partners, leading to the deterministic prediction of continuous invasion by new mutants and an ever increasing number of types. However, rare types are also at an increased risk of being lost by random drift. Calculating the number of mating types that a population can maintain requires consideration of both the deterministic advantages and the stochastic risks. By comparing the relative importance of selection and drift, we show that a population of size N can maintain a maximum of approximately N 1/3 mating types. Although the number of mating types in a population is quite stable, the rare type advantage promotes turnover of types. We derive explicit formulas for both the invasion and turnover probabilities in finite populations. Being vanishingly rare is thus a blessing and a curse associated with both universal compatibility and a high risk of extinction.