| Texto completo | |
| Autor(es): |
Milani, Diogo
;
Bardella, Vanessa B.
;
Hickmann, Frederico
;
Correa, Alberto S.
;
Michel, Andrew P.
;
Mora, Pablo
;
Rico-Porras, Jose M.
;
Palomeque, Teresa
;
Lorite, Pedro
;
Cabral-de-Mello, Diogo C.
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHROMOSOMA; v. 134, n. 1, p. 13-pg., 2025-12-01. |
| Resumo | |
Sex chromosomes have independently evolved in various species, displaying unique evolutionary patterns, including differentiation, degeneration, and repetitive DNA accumulation. Pentatomidae hemipterans are characterized by a highly conserved diploid number of 2n = 14 with a XX/XY sex chromosome system, i.e. 2n = 14, 12 A + XY. Thus, it represents an interesting group for investigating the reorganization of repeats in conserved karyotypes, i.e. the absence of large chromosomal rearrangements. Using comparative genomic hybridization (CGH) with male and female genomic DNAs (gDNA), this study examined a total of 25 Pentatomidae species to uncover repetitive DNA dynamics and their role in chromosome differentiation, especially sex chromosome differentiation. New karyotype data for nine species reinforces the chromosomal stasis in Pentatomidae for macro-chromosomal structure. However, significant variability in repetitive DNA patterns on autosomes and sex chromosomes has been revealed despite the karyotypic conservation. Autosomal signals varied in intensity and distribution, with some species exhibiting terminal enrichment of repeats, while others displayed dispersed patterns. Sex chromosomes showed distinct hybridization patterns, with the Y chromosome exhibiting more significant variability compared to the X. These findings emphasize the dynamic nature of sex chromosomes and suggest further studies combining genomic sequencing and cytogenetics to uncover sequences and the mechanisms behind their evolution. (AU) | |
| Processo FAPESP: | 24/01521-9 - Explorando o Impacto dos DNAs Repetitivos na Evolução Cariotípica de Membracidae (Hemiptera) |
| Beneficiário: | Pablo Mora Ruiz |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 19/19069-7 - Investigando a evolução de DNAs satélites em cromossomos holocêntricos de insetos praga |
| Beneficiário: | Diogo Cavalcanti Cabral-De-Mello |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 18/20351-6 - Dormência e adaptação a hospedeiros de duas linhagens alopátricas de Euschistus heros (Hemiptera: Pentatomidae) |
| Beneficiário: | Frederico Hickmann |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 18/21772-5 - Citogenômica cigarrinha praga Aetalion reticulatum (Aetalionidae: Hemiptera): análise dos DNAs repetitivos e cromossomos B |
| Beneficiário: | Vanessa Bellini Bardella |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 21/05908-7 - Arquitetura genômica e evolução de cromossomos sexuais em percevejos Pentatomidae pragas e espécies relacionadas |
| Beneficiário: | Diogo Milani |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |