| Full text | |
| Author(s): Show less - |
Silva de Souza, Erica Martinha
[1]
;
Freitas, Lucas
[1]
;
da Silva Ramos, Elisa Karen
[1]
;
Selleghin-Veiga, Giovanna
[1]
;
Rachid-Ribeiro, Michelle Carneiro
[1]
;
Silva, Felipe Andre
[1]
;
Marmontel, Miriam
[2]
;
dos Santos, Fabricio Rodrigues
[3]
;
Laudisoit, Anne
[4]
;
Verheyen, Erik
[5, 6]
;
Domning, Daryl P.
[7, 8]
;
Nery, Mariana Freitas
[1]
Total Authors: 12
|
| Affiliation: | [1] Univ Estadual Campinas, Dept Genet Evolucao Microbiol & Imunol, Inst Biol, Campinas - Brazil
[2] Inst Desenvolvimento Sustentavel Mamiraua, Tefe - Brazil
[3] Univ Fed Minas Gerais, Dept Biol Geral, Belo Horizonte, MG - Brazil
[4] EcoHlth Alliance, New York, NY - USA
[5] Royal Belgian Inst Nat Sci, Brussels - Belgium
[6] Univ Antwerp, Evolutionary Ecol Grp, Biol Dept, Antwerp - Belgium
[7] Smithsonian Inst, Natl Museum Nat Hist, Dept Paleobiol, Washington, DC 20560 - USA
[8] Howard Univ, Dept Anat, Lab Evolutionary Biol, Washington, DC - USA
Total Affiliations: 8
|
| Document type: | Journal article |
| Source: | SCIENTIFIC REPORTS; v. 11, n. 1 FEB 11 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The manatee family encompasses three extant congeneric species: Trichechus senegalensis (African manatee), T. inunguis (Amazonian manatee), and T. manatus (West Indian manatee). The fossil record for manatees is scant, and few phylogenetic studies have focused on their evolutionary history. We use full mitogenomes of all extant manatee species to infer the divergence dates and biogeographical histories of these species and the effect of natural selection on their mitogenomes. The complete mitochondrial genomes of T. inunguis (16,851 bp), T. senegalensis (16,882 bp), and T. manatus (16,882 bp), comprise 13 protein-coding genes, 2 ribosomal RNA genes (rRNA - 12S and 16S), and 22 transfer RNA genes (tRNA), and (D-loop/CR). Our analyses show that the first split within Trichechus occurred during the Late Miocene (posterior mean 6.56 Ma and 95% HPD 3.81-10.66 Ma), followed by a diversification event in the Plio-Pleistocene (posterior mean 1.34 Ma, 95% HPD 0.1-4.23) in the clade composed by T. inunguis and T. manatus; T. senegalensis is the sister group of this clade with higher support values (pp>0.90). The branch-site test identified positive selection on T. inunguis in the 181st position of the ND4 amino acid gene (LRT=6.06, p=0.0069, BEB posterior probability=0.96). The ND4 gene encodes one subunit of the NADH dehydrogenase complex, part of the oxidative phosphorylation machinery. In conclusion, our results provide novel insight into the evolutionary history of the Trichechidae during the Late Miocene, which was influenced by geological events, such as Amazon Basin formation. (AU) | |
| FAPESP's process: | 15/18269-1 - Using comparative genomics to understand convergent evolution of mammals: tracking the molecular footprints of the marine and riverine environment colonisation |
| Grantee: | Mariana Freitas Nery |
| Support Opportunities: | Research Grants - Young Investigators Grants |