Inbreeding Depression and Inbreeding Avoidance in a Natural Population of Guppies (Poecilia reticulata)

Ashley M. Johnson, Grace Chappell, Anna C. Price, F. Helen Rodd, Robert Olendorf, Kimberly A. Hughes

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Maintenance of genetic variation in the face of strong natural selection is a long-standing problem in evolutionary biology. One of the most extreme examples of within-population variation is the polymorphic, genetically determined color pattern of male Trinidad guppies (Poecilia reticulata). Female mating preference for rare or novel patterns has been implicated as a factor in maintaining this variation. The origin of this preference is not understood, although inbreeding avoidance has been proposed as a mechanism. Inbreeding avoidance is advantageous when populations exhibit inbreeding depression and the opportunity for mating between relatives exists. To determine whether these conditions are met in a natural guppy population, we assessed mating and reproductive patterns using polymorphic molecular markers. Females produced more offspring with less-related males than with more-related ones. In addition, females were more likely to have mated with less-related males, but this trend was only marginally significant. Male heterozygosity was positively correlated with mating success and with the number of offspring sired, consistent with strong inbreeding depression for adult male fitness. These results provide substantial insight into mating patterns of a wild guppy population: strong inbreeding depression occurs, and individuals tend to avoid mating with relatives.

Original languageEnglish (US)
Pages (from-to)448-457
Number of pages10
JournalEthology
Volume116
Issue number5
DOIs
StatePublished - May 1 2010

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inbreeding avoidance
inbreeding depression
Poecilia reticulata
inbreeding
mating success
Trinidad and Tobago
evolutionary biology
wild population
mating behavior
natural selection
heterozygosity
genetic variation
fitness
Biological Sciences
genetic markers
color

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Cite this

Johnson, A. M., Chappell, G., Price, A. C., Helen Rodd, F., Olendorf, R., & Hughes, K. A. (2010). Inbreeding Depression and Inbreeding Avoidance in a Natural Population of Guppies (Poecilia reticulata). Ethology, 116(5), 448-457. https://doi.org/10.1111/j.1439-0310.2010.01763.x
Johnson, Ashley M. ; Chappell, Grace ; Price, Anna C. ; Helen Rodd, F. ; Olendorf, Robert ; Hughes, Kimberly A. / Inbreeding Depression and Inbreeding Avoidance in a Natural Population of Guppies (Poecilia reticulata). In: Ethology. 2010 ; Vol. 116, No. 5. pp. 448-457.
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Johnson, AM, Chappell, G, Price, AC, Helen Rodd, F, Olendorf, R & Hughes, KA 2010, 'Inbreeding Depression and Inbreeding Avoidance in a Natural Population of Guppies (Poecilia reticulata)', Ethology, vol. 116, no. 5, pp. 448-457. https://doi.org/10.1111/j.1439-0310.2010.01763.x

Inbreeding Depression and Inbreeding Avoidance in a Natural Population of Guppies (Poecilia reticulata). / Johnson, Ashley M.; Chappell, Grace; Price, Anna C.; Helen Rodd, F.; Olendorf, Robert; Hughes, Kimberly A.

In: Ethology, Vol. 116, No. 5, 01.05.2010, p. 448-457.

Research output: Contribution to journalArticle

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