Extrachromosomal rDNA amplification in the oocytes of Polystoechotes punctatus (Fabricius) (Insecta-Neuroptera-Polystoechotidae).

@article{Kubrakiewicz2002ExtrachromosomalRA,
  title={Extrachromosomal rDNA amplification in the oocytes of Polystoechotes punctatus (Fabricius) (Insecta-Neuroptera-Polystoechotidae).},
  author={Janusz Kubrakiewicz},
  journal={Arthropod structure & development},
  year={2002},
  volume={31 1},
  pages={
          23-31
        }
}
The ovary of Polystoechotes punctatus consists of several ovarioles of meroistic-polytrophic type. Histological, histochemical and ultrastructural studies revealed that the extrachromosomal amplification of rDNA takes place in the oocyte nucleus. Prior to previtellogenic growth the oocyte nucleus contains the chromosomes of meiotic prophase and a condensed extra DNA body. Initial split of extrachromosomal DNA material into several fragments coincides with the appearance of a spherical, fine… CONTINUE READING
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