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Do the different parental “heteroms” cause genomic shock in newly formed allopolyploids?

Comai, L. and Madlung, A. and Josefsson, C. and Tyagi, Anand P. (2003) Do the different parental “heteroms” cause genomic shock in newly formed allopolyploids? Philosophical Transactions of the Royal Society B, 358 . pp. 1149-1155. ISSN 0962-8436

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Abstract

Allopolyploidy, the joining of two parental genomes in a polyploid organism with diploid meiosis, is an important mechanism of reticulate evolution. While many successful long–established allopolyploids are known, those formed recently undergo an instability phase whose basis is now being characterized. We describe observations made with the Arabidopsis system that include phenotypic instability, gene silencing and activation, and methylation changes. We present a model based on the epigenetic destabilization of genomic repeats, which in the parents are heterochromatinized and suppressed. We hypothesize that loss of epigenetic suppression of these sequences, here defined as the heterome, results in genomic instability including silencing of single–copy genes.

Item Type: Journal Article
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Ms Mereoni Camailakeba
Date Deposited: 23 Apr 2003 19:43
Last Modified: 09 Jul 2012 19:58
URI: http://repository.usp.ac.fj/id/eprint/2771
UNSPECIFIED

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