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 C-positive 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.
Occurrence of NORs heteromorphism in the two X chromosomes of different aphid species / Manicardi, G.C., Mandrioli, M., D., B., U., B. - In: Aphids in natural and managed ecosystems / Nieto Nafria J.M. and Dixon A.F.G.. - STAMPA. - Madrid : Universidad de Leon, Secretariado de Publicaciones, 1998. - ISBN 9788477196280. - pp. 91-95
Occurrence of NORs heteromorphism in the two X chromosomes of different aphid species
MANICARDI, Gian Carlo;MANDRIOLI, Mauro;
1998
Abstract
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 C-positive 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.
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