Genetic covariance between components of male reproductive success: within-pair vs. extra-pair paternity in song sparrows

J M Reid (Corresponding Author), P Arcese, S Losdat

Research output: Contribution to journalArticle

10 Citations (Scopus)
6 Downloads (Pure)

Abstract

The evolutionary trajectories of reproductive systems, including both male and female multiple mating and hence polygyny and polyandry, are expected to depend on the additive genetic variances and covariances in and among components of male reproductive success achieved through different reproductive tactics. However, genetic covariances among key components of male reproductive success have not been estimated in wild populations. We used comprehensive paternity data from socially monogamous but genetically polygynandrous song sparrows (Melospiza melodia) to estimate additive genetic variance and covariance in the total number of offspring a male sired per year outside his social pairings (i.e. his total extra-pair reproductive success achieved through multiple mating) and his liability to sire offspring produced by his socially paired female (i.e. his success in defending within-pair paternity). Both components of male fitness showed nonzero additive genetic variance, and the estimated genetic covariance was positive, implying that males with high additive genetic value for extra-pair reproduction also have high additive genetic propensity to sire their socially paired female's offspring. There was consequently no evidence of a genetic or phenotypic trade-off between male within-pair paternity success and extra-pair reproductive success. Such positive genetic covariance might be expected to facilitate ongoing evolution of polygyny and could also shape the ongoing evolution of polyandry through indirect selection.

Original languageEnglish
Pages (from-to)2046-2056
Number of pages11
JournalJournal of Evolutionary Biology
Volume27
Issue number10
Early online date3 Sep 2014
DOIs
Publication statusPublished - Oct 2014

Fingerprint

genetic covariance
Passeriformes
paternity
song
animal communication
reproductive success
genetic variance
polyandry
polygyny
multiple mating
sires
reproductive system
trajectories
liability
wild population
trade-off
fitness
trajectory

Keywords

  • Animals
  • Female
  • Genetic Fitness
  • Genetic Variation
  • Male
  • Models, Genetic
  • Reproduction
  • Sexual Behavior, Animal
  • Sparrows
  • Journal Article
  • Research Support, Non-U.S. Gov't

Cite this

Genetic covariance between components of male reproductive success : within-pair vs. extra-pair paternity in song sparrows. / Reid, J M (Corresponding Author); Arcese, P; Losdat, S.

In: Journal of Evolutionary Biology, Vol. 27, No. 10, 10.2014, p. 2046-2056.

Research output: Contribution to journalArticle

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