CYTOGENETICS OF SOUTH-AMERICAN AKODONT RODENTS (CRICETIDAE) .5. SEGREGATION OF CHROMOSOME NO 1 POLYMORPHISM IN AKODON-MOLINAE

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. © 1979 Birkhäuser Verlag.