Karyotypic characterization by mitosis, meiosis and C-banding of Eriopis connexa Mulsant (Coccinellidae: Coleoptera: Polyphaga), a predator of insect pests.
Eriopis connexa presents a chromosome number of 2n = 18 + XX for most females analyzed and a meioformula of n = 9 + Xyp for all males. A small metacentric B chromosome restricted to females occurred in 10% of our sample and, when submitted to C-banding, it was 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 of all chromosomes in the complement.
Maffei
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EM
Departamento de Biologia Geral, Universidade Federal de Viçosa, Minas Gerais, Brasil. emaffei@alunos.ufv.br
Gasparino
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Pompolo S das
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D000818:Animals; D002843:Chromatin / Q000235:genetics; D002871:Chromosome Banding; D002875:Chromosomes; D001517:Coleoptera / Q000235:genetics*; D004276:DNA, Satellite; D022041:Euchromatin; D005260:Female; D006570:Heterochromatin / Q000235:genetics; D007621:Karyotyping; D008297:Male; D008540:Meiosis / Q000235:genetics*; D008938:Mitosis / Q000235:genetics*; D009697:Nucleolus Organizer Region / Q000235:genetics; D012730:Sex Chromosomes / Q000235:genetics
D002843:Chromatin; D004276:DNA, Satellite; D022041:Euchromatin; D006570:Heterochromatin