Females tend to prefer genetically similar mates in an island population of house sparrows

Bichet, Coraline; Penn, Dustin J.; Moodley, Yoshan; Dunoyer, Luc A.; Cellier-Holzem, Elise; Belvalette, Marie; Grégoire, Arnaud; Garnier, Stéphane; Sorci, Gabriele

doi:10.1186/1471-2148-14-47

Cited by 21 publications

(27 citation statements)

References 79 publications

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“…[4,20,34] for figure 1b,c,d, respectively). Figure 1b is also in line with findings of closer relatedness in EPC partners than social partners [16][17][18][19]. As a whole, our modelling supports the idea of Kleven et al [17] that kin selection and avoidance of inbreeding depression have to be considered together to understand the diversity of mating patterns with respect to inbreeding.…”

Section: Discussionsupporting

confidence: 90%

Why inclusive fitness can make it adaptive to produce less fit extra-pair offspring

Lehtonen

Kokko

2015

Proc. R. Soc. B.

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Social monogamy predominates in avian breeding systems, but most socially monogamous species engage in promiscuous extra-pair copulations (EPCs). The reasons behind this remain debated, and recent empirical work has uncovered patterns that do not seem to fit existing hypotheses. In particular, some results seem to contradict the inbreeding avoidance hypothesis: females can prefer extra-pair partners that are more closely related to them than their social partners, and extra-pair young can have lower fitness than within-pair young. Motivated by these studies, we show that such results can become explicable when an asymmetry in inbreeding tolerance between monogamy and polygamy is extended to species that combine both strategies within a single reproductive season. Under fairly general conditions, it can be adaptive for a female to choose an unrelated social partner, but inbreed with an extrapair partner. Inbreeding depression is compensated for by inclusive fitness benefits, which are only fully realized in EPCs. We also show that if a female has already formed a suboptimal social bond, there are scenarios where it is beneficial to engage in EPCs with less related males, and others where EPCs with more related males increase her inclusive fitness. This has implications for detecting general relatedness or fitness trends when averaged over several species.

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Section: Discussionsupporting

confidence: 90%

Why inclusive fitness can make it adaptive to produce less fit extra-pair offspring

Lehtonen

Kokko

2015

Proc. R. Soc. B.

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“…And, the low parasite pressures encountered in insular populations has been hypothesized to be at the origin of the absence of mate choice for MHC class I genes in an insular population of house sparrows ( Passer domesticus ) (Bichet et al. ).…”

Section: Discussionmentioning

confidence: 99%

“…Genetic compatibility was targeted both at neutral and MHC loci. A choice for genome-wide compatibility is expected in inbred populations where the cost of inbreeding is high (Bernatchez and Landry 2003;Setchell and Huchard 2010; but see Bichet et al 2014). The cost of inbreeding is likely to be high in the Alpine marmot because juvenile survival decreases with offspring homozygosity (Cohas et al 2009).…”

Section: Genetic Markersmentioning

confidence: 99%

Mate choice for neutral and MHC genetic characteristics in Alpine marmots: different targets in different contexts?

Ferrandiz-Rovira

Allainé

Callait-Cardinal

et al. 2016

Ecology and Evolution

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Sexual selection through female mate choice for genetic characteristics has been suggested to be an important evolutionary force maintaining genetic variation in animal populations. However, the genetic targets of female mate choice are not clearly identified and whether female mate choice is based on neutral genetic characteristics or on particular functional loci remains an open question. Here, we investigated the genetic targets of female mate choice in Alpine marmots (Marmota marmota), a socially monogamous mammal where extra‐pair paternity (EPP) occurs. We used 16 microsatellites to describe neutral genetic characteristics and two MHC loci belonging to MHC class I and II as functional genetic characteristics. Our results reveal that (1) neutral and MHC genetic characteristics convey different information in this species, (2) social pairs show a higher MHC class II dissimilarity than expected under random mate choice, and (3) the occurrence of EPP increases when social pairs present a high neutral genetic similarity or dissimilarity but also when they present low MHC class II dissimilarity. Thus, female mate choice is based on both neutral and MHC genetic characteristics, and the genetic characteristics targeted seem to be context dependent (i.e., the genes involved in social mate choice and genetic mate choice differ). We emphasize the need for empirical studies of mate choice in the wild using both neutral and MHC genetic characteristics because whether neutral and functional genetic characteristics convey similar information is not universal.

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“…; Wang and Lu ; Bichet et al. ). Although this verbal reasoning seems cogent, no models quantitatively predict whether evolution of polyandry driven by inbreeding avoidance or preference will actually cause detectable differences in mean relatedness between females' initial and additional mates, or to what degree observed differences imply that inbreeding adjustment caused adaptive evolution of polyandry.…”

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confidence: 99%

When does female multiple mating evolve to adjust inbreeding? Effects of inbreeding depression, direct costs, mating constraints, and polyandry as a threshold trait

2016

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Polyandry is often hypothesized to evolve to allow females to adjust the degree to which they inbreed. Multiple factors might affect such evolution, including inbreeding depression, direct costs, constraints on male availability, and the nature of polyandry as a threshold trait. Complex models are required to evaluate when evolution of polyandry to adjust inbreeding is predicted to arise. We used a genetically explicit individual‐based model to track the joint evolution of inbreeding strategy and polyandry defined as a polygenic threshold trait. Evolution of polyandry to avoid inbreeding only occurred given strong inbreeding depression, low direct costs, and severe restrictions on initial versus additional male availability. Evolution of polyandry to prefer inbreeding only occurred given zero inbreeding depression and direct costs, and given similarly severe restrictions on male availability. However, due to its threshold nature, phenotypic polyandry was frequently expressed even when strongly selected against and hence maladaptive. Further, the degree to which females adjusted inbreeding through polyandry was typically very small, and often reflected constraints on male availability rather than adaptive reproductive strategy. Evolution of polyandry solely to adjust inbreeding might consequently be highly restricted in nature, and such evolution cannot necessarily be directly inferred from observed magnitudes of inbreeding adjustment.

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Females tend to prefer genetically similar mates in an island population of house sparrows

Cited by 21 publications

References 79 publications

Why inclusive fitness can make it adaptive to produce less fit extra-pair offspring

Why inclusive fitness can make it adaptive to produce less fit extra-pair offspring

Mate choice for neutral and MHC genetic characteristics in Alpine marmots: different targets in different contexts?

When does female multiple mating evolve to adjust inbreeding? Effects of inbreeding depression, direct costs, mating constraints, and polyandry as a threshold trait

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