title: Cytogenetics of South American akodont rodents (Cricetidae). V. Segregation of chromosome No. 1 polymorphism in Akodon molinae.
abstract: Akodon molinae is polymorphic with 2n=42, 43, 44, where the metacentric autosome No. 1 is homologous to 2 acrocentrics 1a and 1b. Matings between 2n=43 heterozygotes 1/1a, 1b gave a surplus of 1/1 offspring, a moderate reduction of heterozygous and a strong reduction of homozygous 1a, 1b/1a, 1b offspring. The latter type also has a highly reduced fertility.
mesh_terms: D000818:Animals; D002875:Chromosomes / Q000032:analysis*; D003433:Crosses, Genetic; D005260:Female; D005787:Gene Frequency; D007621:Karyotyping; D008297:Male; D011110:Polymorphism, Genetic; D012377:Rodentia / Q000235:genetics*; D013045:Species Specificity