title: Patterns of evolution in Graomys griseoflavus (Rodentia, Cricetidae). I. Protein polymorphism in populations with different chromosome numbers.
abstract: Protein polymorphism has been studied by means of starch gel electrophoresis of tissue extracts in three population samples of Graomys griseoflavus collected at different sites in central-west Argentina. Individuals from two of the samples had chromosomal number 2n = 42 and those from the other sample, 2n = 38, 37 or 36. A total of 28 loci were analyzed. High levels of variability were observed in three samples (P ranging between 0.46 and 0.66; H (epsilon) from 0.160 to 0.188). Genetic distance values between populations with different chromosome numbers were 0.088 and 0.093. Tests in the laboratory showed the existence of post-zygotic reproductive isolation between animals with 2n = 42 and those with 2n = 38, 37 or 36.
authors.affiliation: Cátedra de Quimica Biológica, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Argentina.
authors.forename: G R
authors.initials: GR
authors.lastname: Theiler
authors.forename: C N
authors.initials: CN
authors.lastname: Gardenal
mesh_terms: D000483:Alleles; D000818:Animals; D001118:Argentina; D003411:Arvicolinae / Q000235:genetics*; D005075:Biological Evolution; D002874:Chromosome Mapping; D011110:Polymorphism, Genetic; D011506:Proteins / Q000235:genetics*
chemical_list: D011506:Proteins