Cytogenetic and nucleolar meiotic cycle analyses in Dysdercus imitator Blote, 1931 (Pyrrhocoridae, Heteroptera) from Argentina

• Authors: M.J. Bressa , A.G. Papeschi , E. Fumagalli , P.H. Van_Doesburg , M.L. Larramendy
• Languages of publication: EN

Abstracts

EN

So far, only seven and five species of Dysdercus from the Old and New Worlds, respectively, have been cytogenetically analysed. They all have holokinetic chromosomes and a pre-reductional type of meiosis. In the present study the chromosome complement, male meiosis and nucleolar meiotic cycle of Dysdercus imitator were analysed. During male meiosis several cytogenetic features are remarkable, namely the presence of a long diffuse stage after pachytene, the finding of one or two ring bivalents per cell in almost all specimens, and the presence of several prenucleolar bodies lasting up to telophase II. The origin and function of these prenucleolar bodies could be related to a particular physiological cycle of the meiocytes.

Keywords

EN

DYSDERCUS   HETEROPTERA   HOLOKINETIC CHROMOSOME   KARYOTYPE   MEIOTIC CYCLE   PYRRHOCORIDAE  

Discipline

• EXPERIMENTAL_BIOLOGY_&_MEDICINE: EXPERIMENTAL BIOLOGY & MEDICINE

• Publisher: Institute of Systematics and Evolution of Animals, Polish Academy of Sciences
• Journal: Folia Biologica
• Year: 2003
• Volume: 51
• Issue: 3-4
• Pages: 135-141
• Document Type: ARTICLE
• Publication order reference: M.J. Bressa, Laboratorio de Citogenetica y Catedra de Citologia, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata, Argentina