Chromosomal organization and evolutionary history of Mariner transposable elements in Scarabaeinae coleopterans

Autor(es)

Oliveira, Sarah G. ^[1] ; Cabral-de-Mello, Diogo C. ^[2] ; Moura, Rita C. ^[3] ; Martins, Cesar ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Sao Paulo State Univ, Morphol Dept, Biosci Inst, BR-18618970 Botucatu, SP - Brazil

^[2] UNESP Sao Paulo State Univ, Dept Biol, Biosci Inst, BR-13506900 Rio Claro, SP - Brazil

^[3] UPE Pernambuco State Univ, Inst Biol Sci, Dept Biol, BR-50100130 Recife, PE - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MOLECULAR CYTOGENETICS; v. 6, NOV 29 2013.
• Citações Web of Science: 5

Resumo

Background: With the aim to increase the knowledge on the evolution of coleopteran genomes, we investigated through cytogenetics and nucleotide sequence analysis Mariner transposons in three Scarabaeinae species (Coprophanaeus cyanescens, C. ensifer and Diabroctis mimas). Results: The cytogenetic mapping revealed an accumulation of Mariner transposon in the pericentromeric repetitive regions characterized as rich in heterochromatin and C(0)t-1 DNA fraction (DNA enriched with high and moderately repeated sequences). Nucleotide sequence analysis of Mariner revealed the presence of two major groups of Mariner copies in the three investigated coleoptera species. Conclusions: The Mariner is accumulated in the centromeric area of the coleopteran chromosomes probably as a consequence of the absence of recombination in the heterochromatic regions. Our analysis detected high diversification of Mariner sequences during the evolutionary history of the group. Furthermore, comparisons between the coleopterans sequences with other insects and mammals, suggest that the horizontal transfer (HT) could have acted in the spreading of the Mariner in diverse non-related animal groups. (AU)

• Processo FAPESP: 09/04351-7 - DNAs repetidos e seu papel na diversificação cromossômica em coleópteros da tribo Phanaeini
• Beneficiário: Sárah Gomes de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 08/02830-2 - Organização do genoma de coleópteros escarabaeíneos (Coleoptera, Scarabaeidae, Scarabaeinae) com base na análise de elementos repetitivos de DNA
• Beneficiário: César Martins
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/04533-3 - Análise funcional de cromossomos B, utilizando o peixe ciclídeo Astatotilapia latifasciata como modelo
• Beneficiário: César Martins
• Modalidade de apoio: Auxílio à Pesquisa - Regular