B chromosomes in plants: escapees from the A chromosome genome?

R. Neil Jones, Andreas Houben

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid


B chromosomes are dispensable elements that do not recombine with the A chromosomes of the regular complement and that follow their own evolutionary track. In some cases, they are known to be nuclear parasites with autonomous modes of inheritance, exploiting ‘drive’ to ensure their survival in populations. Their ‘selfishness’ brings them into conflict with their host nuclear genome and generates a host–parasite relationship, with anti-B-chromosome genes working to ameliorate the worst of their excesses in depriving their hosts of genetic resources. Molecular studies are homing in on their sequence organization to give us an insight into the origin and evolution of these enigmatic chromosomes, which are, with rare exceptions, without active genes.
Iaith wreiddiolSaesneg
Tudalennau (o-i)417-423
Nifer y tudalennau7
CyfnodolynPlant Science
Rhif cyhoeddi9
Dyddiad ar-lein cynnar06 Awst 2003
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Medi 2003

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