Karyotypic characterization by mitosis, meiosis and C-banding of Eriopsis connexa Mulsant (Coccinellidae: Coleoptera: Polyphaga), a predator of insect pests.

摘要

Eriopis connexa presented a chromosome number of 2n=18+XX for most females analysed and a meioformula of n=9+Xyp for all males. A small metacentric B chromosome restricted to females occurred in 10 of the sample and, when submitted to C-banding, itwas shown to be almost completely euchromatic. Chromosome pairs 2 and 3 had satellites and probably contained the nucleolar organizer regions (NORs). C-band analysis also revealed that the constitutive heterochromatin was localized in the centromeres ofall chromosomes in the complement.