MHC genotype predicts mate choice in the ring‐necked pheasant<i>Phasianus colchicus</i>

Baratti, Mariella; Dessì‐Fulgheri, Francesco; Ambrosini, Roberto; Bonisoli‐Alquati, Andrea; Caprioli, Manuela; Goti, Emanuele; Matteo, Angelo; Monnanni, Roberto; Ragionieri, Lapo; Ristori, Emma; Romano, Maria; Rubolini, Diego; Scialpi, A.; Saino, Nicola

doi:10.1111/j.1420-9101.2012.02534.x

Cited by 26 publications

(21 citation statements)

References 106 publications

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“…The predictions of model (R+M+G 1 +G 1 2 ) are consistent with the hypothesis that mate choice acts either to avoid the costs of both inbreeding and outbreeding at a genome-wide level, or to pass on a combination of MHC genes to offspring that represents an optimal trade-off between the ability to recognise a breadth of antigens via increased MHC-diversity and disadvantages associated with high MHC-diversity (Nowak et al 1992;Milinski et al 2005;Woelfing et al 2009). Choice for intermediate dissimilarity has also been reported for some female fish (Reusch et al 2001;Milinski et al 2005;Forsberg et al 2007), and birds Baratti et al 2012). The predictions according to the alternative parsimonious model (R+M+G 1 ) are similar to those of our earlier study comparing sires with all potential sires, in which we found selection for maximally, rather than optimally, MHC-dissimilar mates ).…”

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confidence: 62%

Mate-guarding by male mandrills (Mandrillus sphinx) is associated with female MHC genotype

Setchell

Richards

Abbott

et al. 2016

BEHECO

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This is a pre-copyedited, author-produced PDF of an article accepted for publication in Behavioral Ecology following peer review. The version of record Setchell, J. M., Richards, S., Abbott, K. M. Knapp, L. A. (2016) Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. LAY SUMMARYWe examined whether male mate-guarding in mandrills varies with female genotype. Males were less likely to mate-guard females with specific genotypes which may be disadvantageous to offspring, and more likely to mate-guard females with genes that were different to their own, which would result in genetically diverse offspring. ABSTRACTFemale choice for male major histocompatibility complex (MHC) genotype has been widely tested, but the relationship between male mating strategies and female MHC genotype has received far less attention. Moreover, few studies of MHC-associated mate choice test for the fitness effects underlying such choice. We examined mate-guarding by male mandrills, a species with intense male-male competition and female offspring care. We developed a statistical model based on 10 years of observations to describe how the probability a female is mate-guarded varies across her sexual cycle, among cycles and among females. We accounted for female rank, parity and maternal relatedness. We then tested whether the occurrence of mate-guarding is influenced by (i) MHC-dissimilarity, (ii) female MHCdiversity, and (iii) specific female MHC genotypes. Finally, we tested for associations between MHC variables and the ratio of neutrophils to lymphocytes in blood samples taken during routine captures. The best-fit models included either MHC-dissimilarity (males were more likely to mate-guard more dissimilar females, and there was some evidence of preference for intermediate MHC-dissimilarity), or a specific MHC supertype. Four of 11 supertypes investigated were influential and one had a strong negative influence on mateguarding. We found some evidence that the MHC genotype that attracted the least mateguarding was disadvantageous in terms of immune function. However, we did not find evidence that MHC-diversity was related to immune function. These results suggest that highly competitive males modify their mating behaviour based on female MHC genotype, and a possible fitness benefit to mate choice for specific genotypes.

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confidence: 62%

Mate-guarding by male mandrills (Mandrillus sphinx) is associated with female MHC genotype

Setchell

Richards

Abbott

et al. 2016

BEHECO

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“…; Baratti et al . ), whereas further studies even report a reproductive disadvantage for MHC‐dissimilar males (Bonneaud et al . ; Bos et al .…”

Section: Introductionmentioning

confidence: 93%

MHC‐disassortative mate choice and inbreeding avoidance in a solitary primate

et al. 2013

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Sexual selection theory suggests that choice for partners carrying dissimilar genes at the major histocompatibility complex (MHC) may play a role in maintaining genetic variation in animal populations by limiting inbreeding or improving the immunity of future offspring. However, it is often difficult to establish whether the observed MHC dissimilarity among mates drives mate choice or represents a by-product of inbreeding avoidance based on MHC-independent cues. Here, we used 454-sequencing and a 10-year study of wild grey mouse lemurs (Microcebus murinus), small, solitary primates from western Madagascar, to compare the relative importance on the mate choice of two MHC class II genes, DRB and DQB, that are equally variable but display contrasting patterns of selection at the molecular level, with DRB under stronger diversifying selection. We further assessed the effect of the genetic relatedness and of the spatial distance among candidate mates on the detection of MHC-dependent mate choice. Our results reveal inbreeding avoidance, along with disassortative mate choice at DRB, but not at DQB. DRB-disassortative mate choice remains detectable after excluding all related dyads (characterized by a relatedness coefficient r > 0), but varies slightly with the spatial distance among candidate mates. These findings suggest that the observed deviations from random mate choice at MHC are driven by functionally important MHC genes (like DRB) rather than passively resulting from inbreeding avoidance and further emphasize the need for taking into account the spatial and genetic structure of the population in correlative tests of MHC-dependent mate choice.

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“…; Baratti et al. ). Hereafter, we will use the total number of copulations obtained by a male and the total number of partners with which we documented at least one copulation as proxies for its mating success.…”

Section: Methodsmentioning

confidence: 97%

“…,b; Baratti et al. ) and are therefore only briefly summarized here. We purchased 500 freshly laid, unincubated eggs, randomly chosen from a very large breeding stock (L'envol de Retz, Machecoul, France: http://www.envol-de-retz.com/).…”

Section: Methodsmentioning

confidence: 99%

“…Although maternal and paternal identity of individual eggs was not known, the experimental eggs were randomly sampled from a very large pool of eggs, and the 90 males included in the present study were randomly chosen among those that reached sexual maturity (see below and Baratti et al. ). It is thus very unlikely that shared parentage among males confounded our results.…”

Section: Methodsmentioning

confidence: 99%

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Effects of Egg and Circulating Testosterone on Ring‐Necked Pheasant (Phasianus colchicus) Male Traits and Combat Outcome

et al. 2013

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Studies of avian species have shown that maternal effects mediated by the transfer of egg hormones can profoundly affect offspring phenotype and fitness. We previously demonstrated that the injection of a physiological amount of testosterone (T) in the eggs of ring‐necked pheasants (Phasianus colchicus) disrupted the covariation among male morphological traits at sexual maturity and positively affected male mating success. Here, we investigate whether egg T exposure affected adult male circulating T levels at the onset of the breeding season (reflecting gonadal maturation), and the relationship between circulating T and male traits. Egg T exposure did not affect pre‐mating plasma T. T levels were not associated with the expression of secondary sexual and non‐sexual traits or socio‐sexual behaviour (social rank, overall fighting ability and mating success). However, wattle brightness decreased with increasing circulating T in males hatched from T‐eggs (T‐males) but not among control males. In dyadic encounters during the peak mating period, control males with higher pre‐mating T levels had higher chances of being dominant over other control males. However, higher pre‐mating T levels did not predict success in male‐male competition in encounters involving T‐males. We suggest that the long‐term effects of egg T on male phenotype do not originate from differential gonadal maturation according to egg T treatment. Rather, prenatal androgens may have priming effects on functioning of target tissues, translating into differential phenotypic effects according to androgen exposure during embryonic development.

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MHC genotype predicts mate choice in the ring‐necked pheasantPhasianus colchicus

Cited by 26 publications

References 106 publications

Mate-guarding by male mandrills (Mandrillus sphinx) is associated with female MHC genotype

Mate-guarding by male mandrills (Mandrillus sphinx) is associated with female MHC genotype

MHC‐disassortative mate choice and inbreeding avoidance in a solitary primate

Effects of Egg and Circulating Testosterone on Ring‐Necked Pheasant (Phasianus colchicus) Male Traits and Combat Outcome

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