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Article: Sex reversal and primary sex ratios in the common frog (Rana temporaria)

TitleSex reversal and primary sex ratios in the common frog (Rana temporaria)
Authors
KeywordsSex ratio
Sex linkage
Microsatellite
Amphibian
Sex determination
Rana temporaria
Issue Date2010
Citation
Molecular Ecology, 2010, v. 19, n. 9, p. 1763-1773 How to Cite?
AbstractSex reversal has been suggested to have profound implications for the evolution of sex chromosomes and population dynamics in ectotherms. Occasional sex reversal of genetic males has been hypothesized to prevent the evolutionary decay of nonrecombining Y chromosomes caused by the accumulation of deleterious mutations. At the same time, sex reversals can have a negative effect on population growth rate. Here, we studied phenotypic and genotypic sex in the common frog (Rana temporaria) in a subarctic environment, where strongly female-biased sex ratios have raised the possibility of frequent sex reversals. We developed two novel sex-linked microsatellite markers for the species and used them with a third, existing marker and a Bayesian modelling approach to study the occurrence of sex reversal and to determine primary sex ratios in egg clutches. Our results show that a significant proportion (0.09, 95% credible interval: 0.04-0.18) of adults that were genetically female expressed the male phenotype, but there was no evidence of sex reversal of genetic males that is required for counteracting the degeneration of Y chromosome. The primary sex ratios were mostly equal, but three clutches consisted only of genetic females and three others had a significant female bias. Reproduction of the sex-reversed genetic females appears to create all-female clutches potentially skewing the population level adult sex-ratio consistent with field observations. However, based on a simulation model, such a bias is expected to be small and transient and thus does not fully explain the observed female-bias in the field. © 2010 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/291959
ISSN
2023 Impact Factor: 4.5
2023 SCImago Journal Rankings: 1.705
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorAlho, Jussi S.-
dc.contributor.authorMatsuba, Chikako-
dc.contributor.authorMerilä, Juha-
dc.date.accessioned2020-11-17T14:55:28Z-
dc.date.available2020-11-17T14:55:28Z-
dc.date.issued2010-
dc.identifier.citationMolecular Ecology, 2010, v. 19, n. 9, p. 1763-1773-
dc.identifier.issn0962-1083-
dc.identifier.urihttp://hdl.handle.net/10722/291959-
dc.description.abstractSex reversal has been suggested to have profound implications for the evolution of sex chromosomes and population dynamics in ectotherms. Occasional sex reversal of genetic males has been hypothesized to prevent the evolutionary decay of nonrecombining Y chromosomes caused by the accumulation of deleterious mutations. At the same time, sex reversals can have a negative effect on population growth rate. Here, we studied phenotypic and genotypic sex in the common frog (Rana temporaria) in a subarctic environment, where strongly female-biased sex ratios have raised the possibility of frequent sex reversals. We developed two novel sex-linked microsatellite markers for the species and used them with a third, existing marker and a Bayesian modelling approach to study the occurrence of sex reversal and to determine primary sex ratios in egg clutches. Our results show that a significant proportion (0.09, 95% credible interval: 0.04-0.18) of adults that were genetically female expressed the male phenotype, but there was no evidence of sex reversal of genetic males that is required for counteracting the degeneration of Y chromosome. The primary sex ratios were mostly equal, but three clutches consisted only of genetic females and three others had a significant female bias. Reproduction of the sex-reversed genetic females appears to create all-female clutches potentially skewing the population level adult sex-ratio consistent with field observations. However, based on a simulation model, such a bias is expected to be small and transient and thus does not fully explain the observed female-bias in the field. © 2010 Blackwell Publishing Ltd.-
dc.languageeng-
dc.relation.ispartofMolecular Ecology-
dc.subjectSex ratio-
dc.subjectSex linkage-
dc.subjectMicrosatellite-
dc.subjectAmphibian-
dc.subjectSex determination-
dc.subjectRana temporaria-
dc.titleSex reversal and primary sex ratios in the common frog (Rana temporaria)-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-294X.2010.04607.x-
dc.identifier.pmid20345673-
dc.identifier.scopuseid_2-s2.0-77951192549-
dc.identifier.volume19-
dc.identifier.issue9-
dc.identifier.spage1763-
dc.identifier.epage1773-
dc.identifier.eissn1365-294X-
dc.identifier.isiWOS:000276794300003-
dc.identifier.issnl0962-1083-

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