New insights into the six decades of Mesa's hypothesis of chromosomal evolution in Ommexechinae grasshoppers (Orthoptera: Acridoidea)

dc.contributor.authorSantander, Mylena D.
dc.contributor.authorCabral-De-Mello, Diogo C. [UNESP]
dc.contributor.authorTaffarel, Alberto
dc.contributor.authorMartí, Emiliano [UNESP]
dc.contributor.authorMartí, Dardo A.
dc.contributor.authorPalacios-Gimenez, Octavio M.
dc.contributor.authorCastillo, Elio Rodrigo D.
dc.contributor.institutionFCEQyN
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUppsala University
dc.date.accessioned2022-04-29T08:37:33Z
dc.date.available2022-04-29T08:37:33Z
dc.date.issued2021-12-01
dc.description.abstractIn Acridoidea grasshoppers, chromosomal rearrangements are frequently found as deviations from the standard acrocentric karyotype (2n = 23♂/24♀, FN = 23♂/24♀) in either phylogenetically unrelated species or shared by closely related ones, i.e. genus. In the South American subfamily Ommexechinae, most of the species show a unique karyotype (2n = 23♂/24♀, FN = 25♂/26♀) owing to the occurrence of a large autosomal pair (L1) with submetacentric morphology. In the early 1960s, Alejo Mesa proposed the hypothesis of an ancestral pericentric inversion to explain this karyotype variation. Furthermore, in Ommexechinae, extra chromosomal rearrangements (e.g. centric fusions) are recorded between the ancestral X chromosome and autosomes that originated the so-called neo-sex chromosomes. However, the evolutionary significance of the pericentric inversions and centric fusions in Ommexechinae remains poorly explored. Aiming for a better understanding of chromosomal evolution in Ommexechinae, we performed a detailed cytogenetic analysis in five species. Our findings support the hypothesis about the occurrence of an early pericentric inversion in the ancestor of Ommexechinae. Moreover, our results show a complex karyotype diversification pattern due to several chromosome rearrangements, variations in heterochromatin and repetitive DNA dynamics. Finally, the chromosomal mapping of U2 snDNA in L1 provided new insights about the morphological evolution of this autosomal pair and revealed unnoticed chromosome reorganizations.en
dc.description.affiliationLaboratorio de Genética Evolutiva Dr. Claudio J. Bidau. Instituto de Biología Subtropical (IBS) CONICET-UNaM. FCEQyN, Posadas, Misiones
dc.description.affiliationDepartamento de Genética e Biologia Evolutiva Instituto de Biociências Universidade de São Paulo (USP) São Paulo
dc.description.affiliationDepartamento de Biologia Geral e Aplicada Universidade Estadual Paulista (UNESP) Instituto de Biociências/IB, Rio Claro
dc.description.affiliationDepartment of Organismal Biology-Systematic Biology Program Evolutionary Biology Centre Uppsala University
dc.description.affiliationUnespDepartamento de Biologia Geral e Aplicada Universidade Estadual Paulista (UNESP) Instituto de Biociências/IB, Rio Claro
dc.format.extent1141-1155
dc.identifierhttp://dx.doi.org/10.1093/zoolinnean/zlaa188
dc.identifier.citationZoological Journal of the Linnean Society, v. 193, n. 4, p. 1141-1155, 2021.
dc.identifier.doi10.1093/zoolinnean/zlaa188
dc.identifier.issn1096-3642
dc.identifier.issn0024-4082
dc.identifier.scopus2-s2.0-85121372606
dc.identifier.urihttp://hdl.handle.net/11449/230080
dc.language.isoeng
dc.relation.ispartofZoological Journal of the Linnean Society
dc.sourceScopus
dc.subjectcytogenetic
dc.subjectdifferentiation
dc.subjectFISH
dc.subjectinversions
dc.subjectkaryotype
dc.subjectmultigene families
dc.subjectneo-XY
dc.subjectOmmexechidae
dc.subjectrDNAs
dc.subjectU2 snDNA
dc.titleNew insights into the six decades of Mesa's hypothesis of chromosomal evolution in Ommexechinae grasshoppers (Orthoptera: Acridoidea)en
dc.typeArtigo

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