title: Evolutionary mechanisms of runaway chromosome number change in Agrodiaetus butterflies
metadata.name: dc.contributor.author
metadata.value: Vershinina, Alisa O
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Lukhtanov, Vladimir A
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2017-09-19T14:25:40Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2017-09-19T14:25:40Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2017-08-15
metadata.lang: -
metadata.name: dc.identifier
metadata.value: 10.1038/s41598-017-08525-6
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Vershinina A. O., Lukhtanov V. A. 2017. Evolutionary mechanisms of runaway chromosome number change in Agrodiaetus butterflies. Scientific Reports 7: 8199. doi : 10.1038/s41598-017-08525-6
metadata.lang: en_GB
metadata.name: dc.identifier.issn
metadata.value: 10.1038/s41598-017-08525-6
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 10.1038/s41598-017-08525-6
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 10.1038/s41598-017-08525-6
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 10.1038/s41598-017-08525-6
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/7134
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: Despite predictions of the classic, hybrid-sterility model of chromosomal speciation, some organisms demonstrate high rate of karyotype evolution. This rate is especially impressive in Agrodiaetus butterflies that rapidly evolved the greatest chromosome number diversity known in animal kingdom within a single subgenus. Here we analyzed karyotype evolution in Agrodiaetus using phylogenetic comparative methods. We found that chromosome numbers possess a strong phylogenetic signal. This disproves the chromosome megaevolution model that proposes multiple chromosome rearrangements to accumulate independently in each of closely related species. We found that Brownian motion gives a more adequate description of observed trait changes than Ornstein-Uhlenbeck model. This indicates that chromosome numbers evolve via random walk along branches of the phylogeny. We discovered a correlation between karyotype changes and phylogeny branch lengths. This gradual pattern is inconsistent with the hybrid-sterility model which, due to association of major chromosome changes with cladogenetic events, predicts a high degree of punctualism in karyotype evolution. Thus, low underdominace of chromosomal rearrangements and/or prevalence of the recombination-suppression model over the hybrid-sterility model of chromosome speciation are the most common engines of the runaway chromosome number change observed.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Nature Publishing Groups
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: chromosome, evolution, molecular phylogenetics
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Evolutionary mechanisms of runaway chromosome number change in Agrodiaetus butterflies
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 2017_Vershinina_Lukhtanov-Scientific_Reports.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/7134/1/2017_Vershinina_Lukhtanov-Scientific_Reports.pdf
resources.format: Adobe PDF
resources.size: 1,35 MB