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

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorFCEQyN-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUppsala University-
Autor(es): dc.creatorSantander, Mylena D.-
Autor(es): dc.creatorCabral-De-Mello, Diogo C.-
Autor(es): dc.creatorTaffarel, Alberto-
Autor(es): dc.creatorMartí, Emiliano-
Autor(es): dc.creatorMartí, Dardo A.-
Autor(es): dc.creatorPalacios-Gimenez, Octavio M.-
Autor(es): dc.creatorCastillo, Elio Rodrigo D.-
Data de aceite: dc.date.accessioned2025-08-21T16:27:05Z-
Data de disponibilização: dc.date.available2025-08-21T16:27:05Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2021-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1093/zoolinnean/zlaa188-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/230080-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/230080-
Descrição: dc.descriptionIn 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.-
Descrição: dc.descriptionLaboratorio de Genética Evolutiva Dr. Claudio J. Bidau. Instituto de Biología Subtropical (IBS) CONICET-UNaM. FCEQyN, Posadas, Misiones-
Descrição: dc.descriptionDepartamento de Genética e Biologia Evolutiva Instituto de Biociências Universidade de São Paulo (USP) São Paulo-
Descrição: dc.descriptionDepartamento de Biologia Geral e Aplicada Universidade Estadual Paulista (UNESP) Instituto de Biociências/IB, Rio Claro-
Descrição: dc.descriptionDepartment of Organismal Biology-Systematic Biology Program Evolutionary Biology Centre Uppsala University-
Descrição: dc.descriptionDepartamento de Biologia Geral e Aplicada Universidade Estadual Paulista (UNESP) Instituto de Biociências/IB, Rio Claro-
Formato: dc.format1141-1155-
Idioma: dc.languageen-
Relação: dc.relationZoological Journal of the Linnean Society-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcytogenetic-
Palavras-chave: dc.subjectdifferentiation-
Palavras-chave: dc.subjectFISH-
Palavras-chave: dc.subjectinversions-
Palavras-chave: dc.subjectkaryotype-
Palavras-chave: dc.subjectmultigene families-
Palavras-chave: dc.subjectneo-XY-
Palavras-chave: dc.subjectOmmexechidae-
Palavras-chave: dc.subjectrDNAs-
Palavras-chave: dc.subjectU2 snDNA-
Título: dc.titleNew insights into the six decades of Mesa's hypothesis of chromosomal evolution in Ommexechinae grasshoppers (Orthoptera: Acridoidea)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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