title: Geographical variation of heterochromatin in Ctenomys flamarioni (Rodentia-Octodontidae) and its cytogenetic relationships with other species of the genus.
abstract: The first karyotype analysis of Ctenomys flamarioni, based on a sample of 46 specimens collected along the geographical range of this species, is reported. All specimens exhibited a diploid number of 48 but varied in autosomal arm number from a low of 50 to a high of 78. The amount of constitutive heterochromatin also varied with the species' geographical distribution. Comparison of G-band patterns showed a strong relationship between the karyotype of this species and those belonging to the Argentinian mendocinus group.
authors.affiliation: Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
authors.forename: T R
authors.initials: TR
authors.lastname: de Freitas
mesh_terms: D000818:Animals; D002871:Chromosome Banding; D005260:Female; D005828:Genetics, Population; D006570:Heterochromatin / Q000737:chemistry*; D007621:Karyotyping; D008297:Male; D011110:Polymorphism, Genetic; D012377:Rodentia / Q000235:genetics*
chemical_list: D006570:Heterochromatin