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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.)

Cytogenetics, genomics and biodiversity of the South American and African Arapaimidae fish family (Teleostei, Osteoglossiformes)

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de Oliveira, Ezequiel Aguiar [1, 2] ; Carlos Bertollo, Luiz Antonio [2] ; Rab, Petr [3] ; Ezaz, Tariq [4] ; Yano, Cassia Fernanda [2] ; Hatanaka, Terumi [2] ; Jegede, Oladele Ilesanmi [5] ; Tanomtong, Alongklod [6] ; Liehr, Thomas [7] ; Sember, Alexandr [3] ; Maruyama, Sandra Regina [2] ; Feldberg, Eliana [8] ; Viana, Patrik Ferreira [8] ; Cioffiid, Marcelo de Bello [2]
Total Authors: 14
[1] Secretaria Estado Educ Mato Grosso SEDUC MT, Cuiaba, MT - Brazil
[2] Univ Fed Sao Carlos, Dept Genet & Evolucao, Rodovia Washington Luiz, Sao Carlos, SP - Brazil
[3] Czech Acad Sci, Inst Anim Physiol & Genet, Lab Fish Genet, Prague - Czech Republic
[4] Univ Canberra, Inst Appl Ecol, Canberra, ACT - Australia
[5] Adamawa State Univ, Dept Fisheries & Aquaculture, Mubi, Adamawa State - Nigeria
[6] KhonKaen Univ, Tox Subst Livestock & Aquat Anim Res Grp, Muang, Khonkaen - Thailand
[7] Univ Hosp Jena, Inst Human Genet, Jena - Germany
[8] Inst Nacl de Pesquisas da Amazonia, Coordenacao Biodiversidade, Lab Genet Anim, Manaus, Amazonas - Brazil
Total Affiliations: 8
Document type: Journal article
Source: PLoS One; v. 14, n. 3 MAR 25 2019.
Web of Science Citations: 1

Osteoglossiformes represents one of the most ancestral teleost lineages, currently wide-spread over almost all continents, except for Antarctica. However, data involving advanced molecular cytogenetics or comparative genomics are yet largely limited for this fish group. Therefore, the present investigations focus on the osteoglossiform family Arapaimidae, studying a unique fish model group with advanced molecular cytogenetic genomic tools. The aim is to better explore and clarify certain events and factors that had impact on evolutionary history of this fish group. For that, both South American and African representatives of Arapaimidae, namely Arapaima gigas and Heterotis niloticus, were examined. Both species differed markedly by diploid chromosome numbers, with 2n = 56 found in A. gigas and 2n = 40 exhibited by H. niloticus. Conventional cytogenetics along with fluorescence in situ hybridization revealed some general trends shared by most osteoglossiform species analyzed thus far, such as the presence of only one chromosome pair bearing 18S and 5S rDNA sites and karyotypes dominated by acrocentric chromosomes, resembling thus the patterns of hypothetical ancestral teleost karyotype. Furthermore, the genomes of A. gigas and H. niloticus display remarkable divergence in terms of repetitive DNA content and distribution, as revealed by comparative genomic hybridization (CGH). On the other hand, genomic diversity of single copy sequences studied through principal component analyses (PCA) based on SNP alleles genotyped by the DArT seq procedure demonstrated a very low genetic distance between the South American and African Arapaimidae species; this pattern contrasts sharply with the scenario found in other osteoglossiform species. Underlying evolutionary mechanisms potentially explaining the obtained data have been suggested and discussed. (AU)

FAPESP's process: 16/22196-2 - An intercontinental approach of the chromosomal evolution in the order Osteoglossiformes (Teleostei: Osteoglossomorpha). Parte II
Grantee:Marcelo de Bello Cioffi
Support type: Regular Research Grants
FAPESP's process: 17/16328-6 - Visceral Leishmaniasis: genomics approaches for integrated molecular analysis of host and parasite.
Grantee:Sandra Regina Costa Maruyama
Support type: Scholarships in Brazil - Young Researchers