BEST OF BOTH WORLDS? ASSOCIATION BETWEEN OUTCROSSING AND PARASITE LOADS IN A SELFING FISH
Article first published online: 7 JUN 2011
© 2011 The Author(s). Evolution© 2011 The Society for the Study of Evolution.
Volume 65, Issue 10, pages 3021–3026, October 2011
How to Cite
Ellison, A., Cable, J. and Consuegra, S. (2011), BEST OF BOTH WORLDS? ASSOCIATION BETWEEN OUTCROSSING AND PARASITE LOADS IN A SELFING FISH. Evolution, 65: 3021–3026. doi: 10.1111/j.1558-5646.2011.01354.x
- Issue published online: 3 OCT 2011
- Article first published online: 7 JUN 2011
- Accepted manuscript online: 20 MAY 2011 12:13PM EST
- Received November 30, 2010, Accepted May 10, 2011, Data Archived: Dryad doi:10.5061/dryad.35s4c
- Kryptolebias marmoratus;
- mixed mating;
Mixed-mating strategies (i.e., intermediate levels of self-fertilization and outcrossing in hermaphrodites) are relatively common in plants and animals, but why self-fertilization (selfing) rates vary so much in nature has proved difficult to explain. We tested the hypothesis that parasites help maintain mixed-mating using a partially selfing fish (Kryptolebias marmoratus) as a model. We show that outcrossed progeny in the wild are genetically more diverse and less susceptible to multiple parasite infections than their selfed counterparts. Given that outcrossing in K. marmoratus can only be attained by male-hermaphrodite matings, our data provide an explanation for the coexistence of males and hermaphrodites in androdioecious species where hermaphrodites are unable to outcross among themselves. Moreover, our study provides evidence that parasites contribute to maintaining mixed-mating in a natural animal population.