Distinct centric fusions in different populations of Deltamys kempi (Rodentia, Cricetidae) from South America.
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.
Castro
E C
EC
Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
Mattevi
M S
MS
Maluf
S W
SW
Oliveira
L F
LF
D000220:Adaptation, Biological; D000818:Animals; D003411:Arvicolinae / Q000235:genetics*; D002869:Chromosome Aberrations; D005260:Female; D007621:Karyotyping; D008297:Male; D014178:Translocation, Genetic