Chromosomal phylogeny of four Akodontini species (Rodentia, Cricetidae) from southern Brazil established by Zoo-FISH using Mus musculus (Muridae) painting probes.
We established chromosome homology maps between Mus musculus (MMU) and five species of the Akodontini tribe, Akodon cursor (2n = 14, 15 and 16), A. montensis (2n = 24), A. paranaensis (2n = 44), A. serrensis (2n = 46) and Oligoryzomys flavescens (2n = 66) by Zoo-FISH (fluorescence in situ hybridization) using mouse chromosome-specific probes. The aims of this study were (1) to detect the chromosomal rearrangements responsible for the karyotype variation in this tribe and (2) to reconstruct the phylogenetic relationships among these species. We observed four common syntenic associations of homologous chromosome segments, of which the MMU 7/19 has been described previously in other rodents from Africa, Asia and Europe, and might represent a phylogenetic link between the Old World and Neotropical rodents. The remaining three associations (3/18, 6/12 and 8/13) have been observed exclusively in Neotropical rodents so far, which at present can be considered synapomorphic traits of this group. Five further mouse chromosomes (MMU 4, 9, 14, 18 and 19) were each found evolutionarily conserved as a separate syntenic unit. Our phylogenetic analysis using parsimony and heuristic search detected one consistent group, separating the Akodontini from other rodents.
Hass
Iris
I
Departmento de Genética, Centro Politécnico, Universidade Federal do Paraná, Caixa Postal 19071, CEP 81531-970, Curitiba, Brazil.
Sbalqueiro
Ives José
IJ
Müller
Stefan
S
D000818:Animals; D003411:Arvicolinae / Q000235:genetics*; D001938:Brazil; D002874:Chromosome Mapping; D020223:Chromosome Painting; D002875:Chromosomes / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence; D051379:Mice; D015335:Molecular Probes; D010802:Phylogeny
D015335:Molecular Probes