The evolution of sperm competition genes: The effect of mating system on levels of genetic variation within and between species
| Autor: | Michael J. Wade, Amy L. Dapper |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genetics media_common.quotation_subject Fertility Biology Mating system 010603 evolutionary biology 01 natural sciences Sperm Competition (biology) Sexual conflict 03 medical and health sciences 030104 developmental biology Sexual selection Genetic variation General Agricultural and Biological Sciences Sperm competition Ecology Evolution Behavior and Systematics media_common |
| Zdroj: | Evolution. 70:502-511 |
| ISSN: | 0014-3820 |
| DOI: | 10.1111/evo.12848 |
| Popis: | It is widely established that proteins involved in reproduction diverge between species more quickly than other proteins. For male sperm proteins, rapid divergence is believed to be caused by postcopulatory sexual selection and/or sexual conflict. Here, we derive the expected levels of gene diversity within populations and divergence between them for male sperm protein genes evolving by postcopulatory, prezygotic fertility competition, i.e. the function imputed for some sperm and seminal fluid genes. We find that, at the mutation-selection equilibrium, both gene diversity within species and divergence between them are elevated relative to genes with similar selection coefficients expressed by both sexes. We show that their expected level of diversity is a function of the harmonic mean number of mates per female, which affects the strength of fertility selection stemming from male-male sperm competition. Our predictions provide a null hypothesis for distinguishing between other selective hypotheses accounting for the rapid evolution of male reproductive genes. |
| Databáze: | OpenAIRE |
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