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Molecular phylogenies, chromosomes and dispersion in Brazilian akodontines (Rodentia, Sigmodontinae) Iheringia, Sér. Zool.
Barros,Maria Claudene; Sampaio,Iracilda; Schneider,Horacio; Langguth,Alfredo.
A new molecular phylogeny for akodontine rodents from Brazil was proposed. The phylogenetic tree was enriched with the area of occurrence and with information on the karyotype of the samples. Based on this enriched tree, and with a described methodology, hypotheses were proposed on the karyotype and area of occurrence of the ancestors of each Clade. Thus it was possible to discuss hypotheses on chromosome evolution of the group, and on dispersion events from the "area of original differentiation" of akodontines in the Andes. Chromosome evolution started with high diploid numbers (2n=52) and showed a tendency to reduction (until 2n=14 in more recent clades). Independent side-branches of the tree showed 2n reduction and in one case the 2n increased. At least...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian akodontines; Chromosome evolution; Biogeography; Molecular phylogeny.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000400006
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