Data/hora: 09/06/2024 17:09:48

Provedor de dados: | 74
País: | Brazil
Título: | Phylogenetic relationships and karyotype evolution in the sigmodontine rodent Akodon (2n = 10 and 2n = 16) from Brazil
Autores: | Silva,Maria José de J.; Patton,James L.; Yonenaga-Yassuda,Yatiyo.
Data: | 2006-01-01
Ano: | 2006
Palavras-chave: | Akodon; Cytochrome-b; G-bands; Karyotypical evolution; Phylogeny.
Resumo: | Comparison of G-bands from 2n = 10 and 2n = 16 karyotypes of Akodon revealed tandem fusions, pericentric inversions and Robertsonian rearrangement in autosomes and addition/deletion of constitutive heterochromatin in sex chromosomes. Cytochrome-b sequences indicate that the 2n = 10 karyotype is a new species and show it to be a sister taxon of the 2n = 14, 2n = 15 and 2n = 16 karyotypes. Indeed, this group shows a particular evolutionary situation in which a unique taxonomic unit based on morphological data can be detected, but, karyologically, it can be separated into two groups (2n = 14-15-16 and 2n = 10). Cytochrome-b sequences show a finer resolution, indicating that these four karyotypes represent three molecular entities (2n = 14-15, 2n = 16 and 2n = 10) that may be derived from a common ancestor with a 2n = 16 karyotype.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300012
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572006000300012
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.29 n.3 2006
Fonte: | info:eu-repo/semantics/openAccess