Many loci make light work: High individual diversity despite low population diversity and random mating at class I MHC in a Critically Endangered island songbird

MacDougall‐Shackleton, Elizabeth A.

doi:10.1111/mec.15578

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…The effects of bottlenecks on genetic variation differ widely among different species. Low genetic variation was generally observed in most bottlenecked species (Babik et al, 2012;Kubota and Watanabe, 2013;Sutton et al, 2013Sutton et al, , 2015Li et al, 2017;Saka et al, 2018;Lan et al, 2019;Arauco-Shapiro et al, 2020), whereas high variation was also detected (Galaverni et al, 2013;Newhouse and Balakrishnan, 2015;Fulton et al, 2017;MacDougall-Shackleton, 2020;Cruz-Lopez et al, 2021). Multiple MHC copies may be a major cause of this high variation (Wan et al, 2011;Stervander et al, 2020;He et al, 2021).…”

Section: Genetic Diversity and Differentiation Of Red-crowned Cranementioning

confidence: 94%

Genetic Diversity and Differentiation of MHC Class I Genes in Red-Crowned Crane Populations

Sun

et al. 2022

Front. Ecol. Evol.

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The red-crowned crane (Grus japonensis) has been demoted to “vulnerable species” because its populations have apparently stabilized in Japan and Korea. Low variation and genetic drift may cause damage to the nascent recovery of the G. japonensis population. The major histocompatibility complex (MHC) is one of the most polymorphic gene families in the vertebrate genome and can reflect information on the adaptive evolution of endangered species. In this study, variations in MHC I exon 3 of captive G. japonensis in China were assessed and compared with those in cranes from Japan. Forty MHC alleles of 274 base pairs were isolated from 32 individuals from two captive populations in China. There was high variability in the nucleotide and amino acid composition, showing the proportion of polymorphic sites of 18.98 and 32.97%, respectively. Comparative analyses of the Chinese and Japanese populations based on 222 base pair sequences revealed more alleles and higher variation in the Chinese population. The lack of significant geographical differentiation of G. japonensis was supported by the genetic differentiation coefficient (0.04506) between the Chinese and Japanese populations. Positive selection of antigen-binding sites was observed, which contributed to maintaining the diversity of MHC class I genes. Phylogenetic analysis suggested the persistence of trans-species polymorphisms among MHC class I genes in Gruidae species. Our results may contribute to optimizing the management of G. japonensis populations and population recovery of this threatened species.

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Section: Genetic Diversity and Differentiation Of Red-crowned Cranementioning

confidence: 94%

Genetic Diversity and Differentiation of MHC Class I Genes in Red-Crowned Crane Populations

Sun

et al. 2022

Front. Ecol. Evol.

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“…Most research on female choice has focused on the effects of genetic compatibility and/or single physical and behavioral characteristics of males ( Coltman et al 2002 ; Kruuk et al 2002 ; MacDougall-Shackleton 2020 ; Stervander et al 2020 ). Many such characteristics have been identified that influence a male’s ability to gain access to fertile females, including body size, rank, ornamentation, weapons, social skills, and experience ( Andersson 1994 ).…”

mentioning

confidence: 99%

Female preferences for male golden snub-nosed monkeys vary with male age and social context

Yang

Berman

et al. 2021

Current Zoology

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Age is a key factor affecting sexual selection, as many physical and social traits are age-related. Although studies of primate mate choice often consider particular age-related traits, few consider the collective effects of male age. We tested the hypothesis that female golden snub-nosed monkeys Rhinopithecus roxellana prefer prime aged males (10–15 years) over younger and older males. We examined a habituated, provisioned troop during a 3-year study in the Qinling Mountains, China. Prime age males were more likely to be resident males of one-male units (OMUs) than males of other ages. Since females are free to transfer between OMUs, the number of females per OMU can be indicative of female preferences. We examined the number of females per OMU, and found that it increased with resident male age up to 7–8 years, and declined after 12 years, such that prime age resident males had more females than other resident males. Females also initiated extra-unit copulations with high-ranking prime age males at significantly higher rates than with other males. Nevertheless, females tended to transfer from OMUs with high-ranking, older resident males to those with lower-ranking, younger resident males. Thus, females appear to use different strategies when choosing social mates and extra-unit mates (i.e., different social contexts). We speculate that females may perceive early signs of aging in males and trade off the benefits and costs of high rank vs. male senescence. This study lays the groundwork for future studies that examine possible direct and indirect benefits of such strategies.

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“…(2020) show that the multicopy nature of MHC‐I allows for the maintenance of high levels of within‐individual allelic diversity. As MacDougall‐Shackleton (2020) points out, these results demonstrate how gene duplication events can have important long‐term evolutionary consequences.…”

Section: Highlights Of 2020mentioning

confidence: 62%

Editorial 2021

Rieseberg¹,

Warschefsky²,

O’Boyle³

et al. 2020

Molecular Ecology

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Many loci make light work: High individual diversity despite low population diversity and random mating at class I MHC in a Critically Endangered island songbird

Cited by 3 publications

References 10 publications

Genetic Diversity and Differentiation of MHC Class I Genes in Red-Crowned Crane Populations

Genetic Diversity and Differentiation of MHC Class I Genes in Red-Crowned Crane Populations

Female preferences for male golden snub-nosed monkeys vary with male age and social context

Editorial 2021

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