Cytogenetic and Molecular Analysis of Heterochromatic Areas in the Holocentric Chromosomes of Different Aphid Species

  • Gian Carlo Manicardi
  • Mauro Mandrioli
  • Davide Bizzaro
  • Umberto Bianchi


In this paper we review recent work concerning both cytogenetic and molecular features of constitutive heterochromatin in the holocentric chromosomes of different aphid species. Sections include an extensive survey regarding chromosomal localization and DNA base composition of Cpositive areas together with a cytological and molecular analysis of nucleolar organizer regions. The possible role of mitotic crossing over on genetic variability in parthenogenetic lineages is also briefly reviewed.

Key words

Aphid holocentric chromosomes heterochromatin satellite DNA NORs heteromorphism 


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Copyright information

© Narosa Publishing House, New Delhi, India 2002

Authors and Affiliations

  • Gian Carlo Manicardi
    • 1
  • Mauro Mandrioli
    • 2
  • Davide Bizzaro
    • 3
  • Umberto Bianchi
    • 4
  1. 1.Dipartimento di Biologia AnimaleUniversità di ModenaModenaItaly
  2. 2.Dipartimento di Biologia AnimaleUniversità di ModenaModenaItaly
  3. 3.Dipartimento di Biologia AnimaleUniversità di ModenaModenaItaly
  4. 4.Dipartimento di Biologia AnimaleUniversità di ModenaModenaItaly

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