Promiscuity: an inbreeding avoidance mechanism in a socially monogamous species?

Brooked, M. G.; Rowley, Ian; Adams, Mark A.; Baverstock, P. R.

doi:10.1007/bf00172086

Cited by 163 publications

(180 citation statements)

References 14 publications

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“…The specific conditions of the CIRMF colony represent an experimental setting, allowing the study of evolutionary phenomena that may have influenced mandrills in the wild. For example, past inbreeding depression may have led to the evolution of the incest avoidance mechanisms present in wild populations today (3,4). Finally, such restricted conditions may provide a useful model for populations undergoing habitat fragmentation in the wild (53).…”

Section: Discussionmentioning

confidence: 99%

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Genetic diversity and reproductive success in mandrills ( Mandrillus sphinx )

Charpentier

Setchell

Prugnolle

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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Recent studies of wild animal populations have shown that estimators of neutral genetic diversity, such as mean heterozygosity, are often correlated with various fitness traits, such as survival, disease susceptibility, or reproductive success. We used two estimators of genetic diversity to explore the relationship between heterozygosity and reproductive success in male and female mandrills (Mandrillus sphinx) living in a semifree ranging setting in Gabon. Because social rank is known to influence reproductive success in both sexes, we also examined the correlation between genetic diversity and social rank in females, and acquisition of alpha status in males, as well as length of alpha male tenure. We found that heterozygous individuals showed greater reproductive success, with both females and males producing more offspring. However, heterozygosity influenced reproductive success only in dominant males, not in subordinates. Neither the acquisition of alpha status in males, nor social rank in females, was significantly correlated with heterozygosity, although more heterozygous alpha males showed longer tenure than homozygous ones. We also tested whether the benefits of greater genetic diversity were due mainly to a genome-wide effect of inbreeding depression or to heterosis at one or a few loci. Multilocus effects best explained the correlation between heterozygosity and reproductive success and tenure, indicating the occurrence of inbreeding depression in this mandrill colony.correlation heterozygosity-fitness ͉ genome-wide inbreeding ͉ primate ͉ social rank ͉ reproduction O ffspring born to closely related parents often show reduced fitness, a phenomenon known as inbreeding depression (1); this is typically due to increased homozygosity at loci affecting fitness, either by permitting the expression of recessive deleterious alleles or by reducing heterozygote advantage (2). Inbreeding avoidance is thought to underlie the evolution of sex-biased dispersal (3, 4) and has important implications for conservation (5).Most studies of the relationship between inbreeding and fitness have been carried out using domestic or captive animals (reviewed in refs. 6-8). Studies of the influence of inbreeding on overall fitness in natural, or seminatural, populations remain relatively rare because accumulating the generations of pedigree information necessary to calculate inbreeding coefficients requires long-term study, particularly for long-lived organisms. Moreover, studies using inbreeding coefficients are limited where mating between close relatives is infrequent in a population (9). An alternative approach to the use of inbreeding coefficients is to exploit the fact that inbreeding reduces heterozygosity (10).The development of new genetic techniques (e.g., microsatellite analysis), and of estimators of genetic diversity which improve on simple single-locus measures of heterozygosity, has led to increasing numbers of studies of inbreeding depression in wild populations over the past 10 years. For example, Coulson et al. (...

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Section: Discussionmentioning

confidence: 99%

“…Inbreeding avoidance is thought to underlie the evolution of sex-biased dispersal (3,4) and has important implications for conservation (5).…”

mentioning

confidence: 99%

Genetic diversity and reproductive success in mandrills ( Mandrillus sphinx )

Charpentier

Setchell

Prugnolle

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

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“…Absence of inbreeding avoidance or depression has been claimed from studies where pedigrees had been established on the basis of social partnerships only (e.g., Van Noordwijk and Scharloo 1981;Rowley et al 1986;Craig and Jamieson 1988;Gibbs and Grant 1989). In at least one case (the fairy wren, Malurus splendens), subsequent genetic analyses have shown that females are seeking extrapair copulations from unrelated males, who actually sire 65% or more of the offspring (Brooker et al 1990). In our study, pedigrees, relatedness, and inbreeding coefficient were established on the basis of genetic markers, which allowed us to verify that social partners were indeed the genetic contributors.…”

Section: Discussionmentioning

confidence: 99%

Inbreeding in the Greater White-Toothed Shrew, Crocidura Russula

et al. 2003

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Abstract. We combined mark-and-recapture studies with genetic techniques of parentage assignment to evaluate the interactions between mating, dispersal, and inbreeding, in a free-ranging population of Crocidura russula. We found a pattern of limited and female-biased dispersal, followed by random mating within individual neighborhoods. This results in significant inbreeding at the population level: mating among relatives occurs more often than random, and F IT analyses reveal significant deficits in heterozygotes. However, related mating partners were not less fecund, and inbred offspring had no lower lifetime reproductive output. Power analyses show these negative results to be quite robust. Absence of phenotypic evidence of inbreeding depression might result from a history of purging: local populations are small and undergo disequilibrium gene dynamics. Dispersal is likely caused by local saturation and (re)colonization of empty breeding sites, rather than inbreeding avoidance. Because natural populations are finite in size, mating sometimes occurs among relatives, even when partners meet at random. Offspring born from such matings are said to be inbred, and they often display phenotypic abnormalities resulting in a loss of fitness through lower viability or fertility. This inbreeding depression has been repeatedly documented in a number of natural populations, including invertebrates

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“…For example, polyandry stimulates ovulation [6], ensures fertilization, or brings nuptial gifts [2]. Genetic beneits could be paternity choice [6]), sex ratio manipulation particularly in haplodiploid insects [7], inbreeding avoidance by mixed paternity [8], and sperm stored renewal [3].…”

Section: Introductionmentioning

confidence: 99%

Polyandry as a Signal of Phase Shift in Female Desert Locust Schistocerca gregaria

Dushimirimana¹,

Damien²,

Hance³

2017

Future Foods

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The multiple mating by female (polyandry) is a widespread behavior in insect species. This behavior is known to be a kind of itness maximization, but some case of sexual selection factors can explain the evolution of this behavior in relation with the phenotype plasticity model. In this paper, we analyze the role of polyandry in the reproductive success and in the phase shift process in the gregarious desert locust. In an applied perspective, knowledge on the reproductive success and in the phase shift process is essential to perform mass rearing for human food production. Our results suggest that multiple mating is not associated with itness beneits. Polyandry acts as a signal of phase shift through ofspring. We showed that hatchlings of gregarious females mated only once are smaller and green at 87.2% in irst egg pods and produced the solitary form of the desert locust. The coloration of ofspring in females mated with two males reaches only 15.2% of green forms versus 84.8% of mostly blacks. In this study, we showed that females mated more than two times with diferent males produce larger eggs, heavier, and black hatchlings characteristic of gregarious phase known in S. gregaria.

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Promiscuity: an inbreeding avoidance mechanism in a socially monogamous species?

Cited by 163 publications

References 14 publications

Genetic diversity and reproductive success in mandrills ( Mandrillus sphinx )

Genetic diversity and reproductive success in mandrills ( Mandrillus sphinx )

Inbreeding in the Greater White-Toothed Shrew, Crocidura Russula

Polyandry as a Signal of Phase Shift in Female Desert Locust Schistocerca gregaria

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