| Registro completo |
| Provedor de dados: |
Genet. Mol. Biol.
|
| País: |
Brazil
|
| Título: |
Thaptomys Thomas 1915 (Rodentia, Sigmodontinae, Akodontini) with karyotypes 2n = 50, FN = 48, and 2n = 52, FN = 52: two monophyletic lineages recovered by molecular phylogeny
|
| Autores: |
Ventura,Karen
Silva,Maria José de Jesus
Yonenaga-Yassuda,Yatiyo
|
| Data: |
2010-01-01
|
| Ano: |
2010
|
| Palavras-chave: |
Atlantic Rainforest
Cytochrome b
Endemism
Molecular phylogeny
Thaptomys
|
| Resumo: |
A novel karyotype with 2n = 50, FN = 48, was described for specimens of Thaptomys collected at Una, State of Bahia, Brazil, which are morphologically indistinguishable from Thaptomys nigrita, 2n = 52, FN = 52, found in other localities. It was hence proposed that the 2n = 50 karyotype could belong to a distinct species, cryptic of Thaptomys nigrita, once chromosomal rearrangements observed, along with the geographic distance, might represent a reproductive barrier between both forms. Phylogenetic analyses using maximum parsimony and maximum likelihood based on partial cytochrome b sequences with 1077 bp were performed, attempting to establish the relationships among the individuals with distinct karyotypes along the geographic distribution of the genus; the sample comprised 18 karyotyped specimens of Thaptomys, encompassing 15 haplotypes, from eight different localities of the Atlantic Rainforest. The intra-generic relationships corroborated the distinct diploid numbers, once both phylogenetic reconstructions recovered two monophyletic lineages, a northeastern clade grouping the 2n = 50 and a southeastern clade with three subclades, grouping the 2n = 52 karyotype. The sequence divergence observed between their individuals ranged from 1.9% to 3.5%.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200010
|
| Editor: |
Sociedade Brasileira de Genética
|
| Relação: |
10.1590/S1415-47572010005000053
|
| Formato: |
text/html
|
| Fonte: |
Genetics and Molecular Biology v.33 n.2 2010
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
|
