title: Distinct centric fusions in different populations of Deltamys kempi (Rodentia, Cricetidae) from South America.
abstract: Chromosome studies on 28 specimens collected in two Brazilian populations of the rodent species Deltamys kempi disclosed seven different karyotypes, due to two autosome centric fusions (2;3 and 9;15) in homozygous and heterozygous states, and a Y-autosome translocation present in all males. These results, plus those obtained previously in a population from Argentina and another from Brazil, show that this species has 44% of carriers of four autosome centric fusions, and each rearrangement is restricted to a distinct locality.
authors.affiliation: Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: E C
authors.initials: EC
authors.lastname: Castro
authors.forename: M S
authors.initials: MS
authors.lastname: Mattevi
authors.forename: S W
authors.initials: SW
authors.lastname: Maluf
authors.forename: L F
authors.initials: LF
authors.lastname: Oliveira
mesh_terms: D000220:Adaptation, Biological; D000818:Animals; D003411:Arvicolinae / Q000235:genetics*; D002869:Chromosome Aberrations; D005260:Female; D007621:Karyotyping; D008297:Male; D014178:Translocation, Genetic