Phases of sex chromosome inactivation in oncopeltus fasciatus and pyrrhocoris apterus (Insecta, Heteroptera)

Harald Messthaler, Walther Traut

11 Citations (Scopus)

Abstract

Sex chromosomes in Oncopeltus fasciatus and Pyrrhocoris apterus are heterochromatic and transcriptionally inactive in well-defined phases of development. In Oncopeltus, which has the XX/XY type of sex determination, the Y-chromosome seems to be inactive in aE tissues. The X-chromosome is inactivated during the last spermatogonial division and remains so throughout spermatogenesis. The X-chromosome of Pyrrhocoris, which is of the XX/XO type of sex determination is inactive in the same stages as that of Oncopeltus and during an additional phase in early oogenesis. X inactivation in spermatogenesis is interpreted as a form of gross regulation of gene activity on the chromosomal level.

Original languageEnglish
JournalCaryologia
Volume28
Issue number4
Pages (from-to)501-510
Number of pages10
ISSN0008-7114
DOIs
Publication statusPublished - 01.01.1975

Research Areas and Centers

  • Academic Focus: Center for Infection and Inflammation Research (ZIEL)

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