Effect of inbreeding and heritability of sperm competition success in the bulb mite Rhizoglyphus robini
| Autor: | Jacek Radwan, Magdalena Konior, Laurent Keller |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Genetics
Male Reproductive success urogenital system Acaridae/*genetics/physiology Animals Female *Inbreeding Male Selection (Genetics) Sexual Behavior Animal Spermatozoa/*physiology Variation (Genetics) Zoology Genetic Variation Heritability Biology Sperm Spermatozoa Sexual Behavior Animal Sexual selection Inbreeding depression Animals Female Inbreeding Coefficient of relationship Selection Genetic Sperm competition reproductive and urinary physiology Genetics (clinical) Acaridae |
| Zdroj: | Heredity, vol. 94, no. 6, pp. 577-81 |
| ISSN: | 0018-067X |
| Popis: | Sperm competition is a potent evolutionary force shaping the reproductive biology of most animal species. Here, we estimated the heritability of sperm competition success in the promiscuous bulb mite Rhizoglyphus robini. Sperm competition success was measured with the sterile male technique as the proportion of eggs fertilised by the second of three males mated with a single female. Sperm competition success responded significantly to selection. The heritability estimated from the response to five generations of selection was 0.13. We also estimated the effect of inbreeding on sperm competition success. Males produced by sib-mating (F=0.25) had a significantly lower sperm competition success than outbred males. The estimated coefficient of inbreeding depression was 0.53. Such high inbreeding depression together with moderately low heritability is consistent with the view that sperm competitive ability is under strong directional selection and strongly influences the reproductive success of males. |
| Databáze: | OpenAIRE |
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