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Analysis of a possible independent origin of triploid P. formosa outside of the Río Purificación river system

dc.creatorFRANCISCO JAVIER GARCIA DE LEON
dc.creatorManfred Schartl
dc.date2007
dc.identifierhttp://cibnor.repositorioinstitucional.mx/jspui/handle/1001/1022
dc.identifier.urihttp://dspace.cibnor.mx:8080/handle/123456789/1841
dc.description"Unisexuality, or all female reproduction, is rare among vertebrates. Studying these exceptional organisms may give useful information with respect to the evolution and maintenance of sexual reproduction. Poecilia formosa was the first unisexual vertebrate species to be detected and since then has served as a paradigmatic organism for unisexuality and studies on the evolution of sex. It reproduces through gynogenesis, using sperm of males from related species to trigger parthenogenetic development of the unreduced diploid eggs. Like in other unisexual vertebrates, triploids occur in a certain range of P. formosa. It has been suggested that the addition of the host species derived third chromosome set is evolutionary important. Clonal organisms lack sufficient genotypic diversity for adaptive changes to variable environments. Also non-recombining genomes cannot purge deleterious mutations and therefore unisexual organisms should suffer from a genomic decay. Thus, polyploidization leading to triploidy should bring "fresh" genetic material into the asexual lineage. To evaluate the importance of triploidy for maintaining the asexual species, it is important to know whether such an introgression event happens at a reasonable frequency."
dc.formatapplication/pdf
dc.languageeng
dc.publisherFrontiers Media, S. A.
dc.relationinfo:eu-repo/semantics/reference/DOI/DOI:10.1186/1742-9994-4-13
dc.relationinfo:eu-repo/semantics/reference/ISSN/ISSN: 1742-9994
dc.relationinfo:eu-repo/semantics/reference/URL/URL: https://frontiersinzoology.biomedcentral.com/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceFrontiers in Zoology
dc.subjectinfo:eu-repo/classification/AUTOR/Poecilia formosa, fish, genetic
dc.subjectinfo:eu-repo/classification/cti/2
dc.subjectinfo:eu-repo/classification/cti/24
dc.subjectinfo:eu-repo/classification/cti/2401
dc.subjectinfo:eu-repo/classification/cti/240108
dc.subjectinfo:eu-repo/classification/cti/240108
dc.titleAnalysis of a possible independent origin of triploid P. formosa outside of the Río Purificación river system
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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