Chromosomal variation among populations of a fungus-farming ant: implications for karyotype evolution and potential restriction to gene flow

dc.creatorMoura, Mariana Neves
dc.creatorCardoso, Danon Clemes
dc.creatorHeinze, Jürgen
dc.creatorCristiano, Maykon Passos
dc.date2019-04-04T13:37:26Z
dc.date2019-04-04T13:37:26Z
dc.date2018
dc.date.accessioned2023-09-27T20:38:16Z
dc.date.available2023-09-27T20:38:16Z
dc.identifier14712148
dc.identifierhttps://doi.org/10.1186/s12862-018-1247-5
dc.identifierhttp://www.locus.ufv.br/handle/123456789/24296
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8945539
dc.descriptionIntraspecific variation in chromosome structure may cause genetic incompatibilities and thus provides the first step in the formation of species. In ants, chromosome number varies tremendously from 2n = 2 to 2n = 120, and several studies have revealed considerable variation in karyotype within species. However, most previous studies were limited to the description of chromosome number and morphology, and more detailed karyomorphometric analyses may reveal additional, substantial variation. Here, we studied karyotype length, genome size, and phylogeography of five populations of the fungus-farming ant Trachymyrmex holmgreni in order to detect potential barriers to gene flow.Chromosome number and morphology did not vary among the five populations, but karyotype length and genome size were significantly higher in the southernmost populations than in the northern populations of this ant. Individuals or colonies with different karyotype lengths were not observed. Karyotype length variation appears to result from variation in centromere length.T. holmgreni shows considerable variation in karyotype length and might provide a second example of centromere drive in ants, similar to what has previously been observed in Solenopsis fire ants. Whether this variation leads to genetic incompatibilities between the different populations remains to be studied.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherBMC Evolutionary Biology
dc.relationVolume 18, Article 146, Pages 01- 10, 2018
dc.rightsOpen Access
dc.subjectCentromere
dc.subjectKaryotype length
dc.subjectGene flow
dc.subjectTrachymyrmex holmgreni
dc.subjectFormicidae
dc.titleChromosomal variation among populations of a fungus-farming ant: implications for karyotype evolution and potential restriction to gene flow
dc.typeArtigo


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