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Sex-specific organisation of middle repetitive DNA sequences in the mealybug Planococcus lilacinus

Khosla, Sanjeev and Augustus, Meena and Brahmachari, Vani (1999) Sex-specific organisation of middle repetitive DNA sequences in the mealybug Planococcus lilacinus. In: Nucleic Acids Research, 27 (18). pp. 3745-3751.

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Official URL: http://nar.oxfordjournals.org/content/27/18/3745

Abstract

Differential organisation of homologous chromosomes is related to both sex determination and genomic imprinting in coccid insects, the mealybugs. We report here the identification of two middle repetitive sequences that are differentially organised between the two sexes and also within the same diploid nucleus. These two sequences form a part of the male-specific nuclease-resistant chromatin (NRC) fraction of a mealybug Planococcus lilacinus. To understand the phenomenon of differential organisation we have analysed the components of NRC by cloning the DNA sequences present, deciphering their primary sequence, nucleosomal organisation, genomic distribution and cytological localisation, Our observations suggest that the middle repetitive sequences within NRC are functionally significant and we discuss their probable involvement in male-specific chromatin organisation.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Oxford University Press.
Department/Centre: Division of Biological Sciences > Molecular Reproduction, Development & Genetics (formed by the merger of DBGL and CRBME)
Date Deposited: 30 Jun 2011 08:36
Last Modified: 30 Jun 2011 08:36
URI: http://eprints.iisc.ernet.in/id/eprint/38762

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