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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Heterochromatin and molecular characterization of DsmarMITE transposable element in the beetle Dichotomius schiffleri (Coleoptera: Scarabaeidae)

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Author(s):
Xavier, Crislaine [1] ; Cabral-de-Mello, Diogo Cavalcanti [2] ; de Moura, Rita Cassia [1]
Total Authors: 3
Affiliation:
[1] Univ Pernambuco UPE, ICB, Lab Biodiversidade & Genet Insetos, BR-50100130 Recife, PE - Brazil
[2] Univ Estadual Paulista UNESP, IB, Dept Biol, Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Genetica; v. 142, n. 6, p. 575-581, DEC 2014.
Web of Science Citations: 2
Abstract

Cytogenetic studies of the Neotropical beetle genus Dichotomius (Scarabaeinae, Coleoptera) have shown dynamism for centromeric constitutive heterochromatin sequences. In the present work we studied the chromosomes and isolated repetitive sequences of Dichotomius schiffleri aiming to contribute to the understanding of coleopteran genome/chromosomal organization. Dichotomius schiffleri presented a conserved karyotype and heterochromatin distribution in comparison to other species of the genus with 2n = 18, biarmed chromosomes, and pericentromeric C-positive blocks. Similarly to heterochromatin distributional patterns, the highly and moderately repetitive DNA fraction (C (0) t-1 DNA) was detected in pericentromeric areas, contrasting with the euchromatic mapping of an isolated TE (named DsmarMITE). After structural analyses, the DsmarMITE was classified as a non-autonomous element of the type miniature inverted-repeat transposable element (MITE) with terminal inverted repeats similar to Mariner elements of insects from different orders. The euchromatic distribution for DsmarMITE indicates that it does not play a part in the dynamics of constitutive heterochromatin sequences. (AU)

FAPESP's process: 11/19481-3 - Contributions to elucidation of B chromosome biological roles using as model Rhammatocerus brasiliensis (Orthoptera) and Haplochromis obliquidens (Teleostei): structure, evolution and histone proteins modification patterns
Grantee:Diogo Cavalcanti Cabral de Mello
Support Opportunities: Regular Research Grants