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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.)

The 5S rDNA in two Abracris grasshoppers (Ommatolampidinae: Acrididae): molecular and chromosomal organization

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Author(s):
Bueno, Danilo [1] ; Palacios-Gimenez, Octavio Manuel [1] ; Andrea Marti, Dardo [2] ; Mariguela, Tatiane Casagrande [3] ; Cabral-de-Mello, Diogo Cavalcanti [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista, UNESP, Inst Biociencias IB, Dept Biol, BR-13506900 Sao Paulo - Brazil
[2] Univ Nacl Misiones, CONICET, Fac Ciencias Exactas Quim & Nat, Lab Genet Evolut, IBS, RA-3300 Posadas - Argentina
[3] Univ Estadual Paulista, UNESP, Inst Biociencias IB, Dept Zool, BR-13506900 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Molecular Genetics and Genomics; v. 291, n. 4, p. 1607-1613, AUG 2016.
Web of Science Citations: 2
Abstract

The 5S ribosomal DNA (rDNA) sequences are subject of dynamic evolution at chromosomal and molecular levels, evolving through concerted and/or birth-and-death fashion. Among grasshoppers, the chromosomal location for this sequence was established for some species, but little molecular information was obtained to infer evolutionary patterns. Here, we integrated data from chromosomal and nucleotide sequence analysis for 5S rDNA in two Abracris species aiming to identify evolutionary dynamics. For both species, two arrays were identified, a larger sequence (named type-I) that consisted of the entire 5S rDNA gene plus NTS (non-transcribed spacer) and a smaller (named type-II) with truncated 5S rDNA gene plus short NTS that was considered a pseudogene. For type-I sequences, the gene corresponding region contained the internal control region and poly-T motif and the NTS presented partial transposable elements. Between the species, nucleotide differences for type-I were noticed, while type-II was identical, suggesting pseudogenization in a common ancestor. At chromosomal point to view, the type-II was placed in one bivalent, while type-I occurred in multiple copies in distinct chromosomes. In Abracris, the evolution of 5S rDNA was apparently influenced by the chromosomal distribution of clusters (single or multiple location), resulting in a mixed mechanism integrating concerted and birth-and-death evolution depending on the unit. (AU)

FAPESP's process: 14/11763-8 - Contributions to understanding of structure and evolution of sex chromosome systems using as models grashopper and cricket species
Grantee:Diogo Cavalcanti Cabral de Mello
Support Opportunities: Regular Research Grants
FAPESP's process: 14/02038-8 - Evolutionary patterns of sex chromosome systems in crickets: an integrated analysis using cytogenetics and genomics
Grantee:Octavio Manuel Palacios Gimenez
Support Opportunities: Scholarships in Brazil - Doctorate
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
FAPESP's process: 11/18028-3 - Isolation, characterization and chromosomal mapping of repeated DNA sequences in Abracris flavolineata (Acrididae, Ommatolampinae), with enphasis in the B chromosome analysis
Grantee:Danilo Bueno
Support Opportunities: Scholarships in Brazil - Scientific Initiation