Meiotic drive does not impede success in sperm competition in the stalk-eyed fly, Teleopsis dalmanni

Author:

Bates Sadé1ORCID,Meade Lara1ORCID,Pomiankowski Andrew12ORCID

Affiliation:

1. Department of Genetics, Evolution and Environment, University College London , London , United Kingdom

2. CoMPLEX, University College London , London , United Kingdom

Abstract

Abstract Male X-linked meiotic drive systems, which cause the degeneration of Y-bearing sperm, are common in the Diptera. Sperm killing is typically associated with fitness costs that arise from the destruction of wildtype sperm and collateral damage to maturing drive sperm, resulting in poor success under sperm competition. We investigate X-linked meiotic drive fertility in the stalk-eyed fly, Teleopsis dalmanni. Drive male paternity was measured in double mating trials under sperm competition against a wildtype male. Drive males sired the same number of offspring as wildtype males, both when mated first or second. This is the first evidence that drive males can compete equally with non-drive males in double matings, challenging the assumption that drive males inevitably suffer reduced fertility. The finding is in accord with previous work showing that the number of sperm per ejaculate transferred to females during non-competitive single matings does not differ between drive and wildtype males, which is likely due to the adaptive evolution of enlarged testes in drive males. Future experiments will determine whether the competitive ability of drive males is maintained under higher rates of female remating likely to be experienced in nature.

Funder

Physical Sciences Research Council

Natural Environment Research Council

Biotechnology and Biological Sciences Research Council

Publisher

Oxford University Press (OUP)

Subject

General Agricultural and Biological Sciences,Genetics,Ecology, Evolution, Behavior and Systematics

Reference64 articles.

1. Female-driven mechanisms, ejaculate size and quality contribute to the lower fertility of sex-ratio distorter males in Drosophila simulans;Angelard,2008

2. Sex-ratio distorter of Drosophila simulans reduces male productivity and sperm competition ability;Atlan,2004

3. Effects of multiple mating and male eye span on female reproductive output in the stalk-eyed fly, Cyrtodiopsis dalmanni;Baker,2001

4. Accessory gland size influences time to sexual maturity and mating frequency in the stalk-eyed fly, Cyrtodiopsis dalmanni;Baker;Behavioral Ecology,2003

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