Karyotypical Confirmation of Natural Hybridization between Two Manatee Species, Trichechus manatus and Trichechus inunguis

dc.creatorOliveira, Edivaldo H. C. de
dc.creatorGomes, Anderson J. B.
dc.creatorCosta, Alexandra F.
dc.creatorLIma, Renata Emin
dc.creatorBonvicino, Cibele R.
dc.creatorViana, Maria C.
dc.creatorReis, Laura M. A.
dc.creatorVidal, Marcelo D.
dc.creatorCavalcanti, Mirella V. G.
dc.creatorAttademo, Fernanda L. N.
dc.creatorLuna, Fábia O.
dc.creatorSiciliano, Salvatore
dc.date2022-12-02T12:57:38Z
dc.date2022-12-02T12:57:38Z
dc.date2022
dc.date.accessioned2023-09-27T00:03:32Z
dc.date.available2023-09-27T00:03:32Z
dc.identifierOLIVEIRA, Edivaldo H. C. de et al. Karyotypical Confirmation of Natural Hybridization between Two Manatee Species, Trichechus manatus and Trichechus inunguis. Life, v.12, 616, p. 1 - 12, Apr. 2022.
dc.identifier2169-1576
dc.identifierhttps://www.arca.fiocruz.br/handle/icict/55863
dc.identifier10.3390/ life12050616
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8897009
dc.descriptionTwo species of manatees are found in Northern Brazil—the Antillean manatee (Trichechus manatus), which is found along the coast from Florida to Northeastern Brazil, and the Amazonian manatee (Trichechus inunguis), endemic to the Amazon drainage basin. These species show a sympatric distribution in the region of the Marajó Archipelago, an estuarine area surrounding the Amazon River mouth. There is evidence of the occurrence of interspecific hybrids in this area, based on mitochondrial DNA analyses, although the use of nuclear markers has not corroborated this proposal. Considering that these species show very distinct karyotypes, despite being closely related (2n = 48 in T. manatus and 2n = 56 in T. inunguis), hybrids would present distinct chromosome numbers. Based on this, we conducted cytogenetic analyses using classic and molecular techniques in three calves found stranded in the Marajó Island and Amapá coast. The results showed that one of them, morphologically classified as T. inunguis, presented the correspondent karyotype, with 2n = 56. However, the other two, which were phenotypically similar to T. manatus, showed 2n = 49. Despite the same diploid number, their G-banding patterns revealed some differences. The results of the distribution of some microsatellite sequences have also confirmed the heterozygosity of some chromosomal pairs in these two individuals. These results are the first indubitable confirmation of the occurrence of natural hybrids between T. manatus and T. inunguis, and also brings about some issues concerning the viability of hybrids, considering that these two individuals do not correspond to an F1 hybrid, but instead, both presented a possible F2 karyotype..
dc.formatapplication/pdf
dc.languageeng
dc.publisherMDPI
dc.rightsopen access
dc.subjectCariótipos
dc.subjectHibridação
dc.subjectHeterozigosidade
dc.subjectIntrogressão
dc.subjectSimpatria
dc.subjectFertilidade
dc.subjectKaryotypes
dc.subjectHybridization
dc.subjectHeterozygosity
dc.subjectIntrogression
dc.subjectSympatry
dc.subjectFertility
dc.titleKaryotypical Confirmation of Natural Hybridization between Two Manatee Species, Trichechus manatus and Trichechus inunguis
dc.typeArticle


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