Deciphering the Evolutionary History of Arowana Fishes (Teleostei, Osteoglossiformes, Osteoglossidae): Insight from Comparative Cytogenomics

Arowanas (Osteoglossinae) are charismatic freshwater fishes with six species and two genera ( and ) distributed in South America, Asia, and Australia. In an attempt to provide a better assessment of the processes shaping their evolution, we employed a set of cytogenetic and genomic approaches, inclu...

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Published in:International journal of molecular sciences 2019-09, Vol.20 (17), p.4296
Main Authors: Cioffi, Marcelo de Bello, Ráb, Petr, Ezaz, Tariq, Bertollo, Luiz Antonio Carlos, Lavoué, Sebastien, Oliveira, Ezequiel Aguiar de, Sember, Alexandr, Molina, Wagner Franco, Souza, Fernando Henrique Santos de, Majtánová, Zuzana, Liehr, Thomas, Al-Rikabi, Ahmed Basheer Hamid, Yano, Cassia Fernanda, Viana, Patrik, Feldberg, Eliana, Unmack, Peter, Hatanaka, Terumi, Tanomtong, Alongklod, Perez, Manolo Fernandez
Format: Article
Language:English
Subjects:
Animals
Biogeography
Biological Evolution
Biomedical materials
Chromosome Banding
Chromosome Mapping
Chromosomes
Cytogenetics
Datasets
Dispersal
Divergence
Evolution
Fish
Fishes - genetics
Fossils
Genetic Variation
Genomes
Genomics
Genotyping Techniques
Geography
Heterochromatin
Hypotheses
Karyotype
Karyotypes
Osteoglossidae
Osteoglossiformes
Phylogenetics
Phylogeny
Polymorphism
Principal Component Analysis
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Summary:Arowanas (Osteoglossinae) are charismatic freshwater fishes with six species and two genera ( and ) distributed in South America, Asia, and Australia. In an attempt to provide a better assessment of the processes shaping their evolution, we employed a set of cytogenetic and genomic approaches, including i) molecular cytogenetic analyses using C- and CMA /DAPI staining, repetitive DNA mapping, comparative genomic hybridization (CGH), and Zoo-FISH, along with ii) the genotypic analyses of single nucleotide polymorphisms (SNPs) generated by diversity array technology sequencing (DArTseq). We observed diploid chromosome numbers of 2 = 56 and 54 in and , respectively, and 2 = 50 in while and presented 2 = 48 and 44, respectively. A time-calibrated phylogenetic tree revealed that and divergence occurred approximately 50 million years ago (MYA), at the time of the final separation of Australia and South America (with Antarctica). Asian and Australian diverged about 35.5 MYA, substantially after the latest terrestrial connection between Australia and Southeast Asia through the Indian plate movement. Our combined data provided a comprehensive perspective of the cytogenomic diversity and evolution of arowana species on a timescale.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms20174296