Aberrant plants in cauliflower: 2. Aneuploidy and global DNA methylation
Aberrant phenotypes of cauliflower were detected throughout the cultivation period and in any variety type. The rate of these phenotypes in the field has recently increased. We reported previously on the first part of our results which showed that (1) the rate of aberrant plants varied with genotype and cultivation area, (2) the aberrant phenotypes can evolve or reverse to normality during the plant cycle and (3) the capacity to express a variant phenotype can be transmitted to the progeny. An epigenetic hypothesis has been proposed to explain the determinism of the phenomenon. Further investigation on the ''aberrant'' character focussed on the flow cytometric estimation of ploidy levels and on the parallel observation of meiosis. Only a fraction of aberrant plants did show aneuploidy and various plo?¨dy levels were found for the same phenotype. Indeed, aneuploidy could not be related to the aberrant phenotype although it could probably be a consequence of the aberration phenomenon. HPLC analysis of global DNA methylation rates showed that DNA hypermethylation occurred in plants which exhibited an evolution of their phenotype during vegetative cycle. The epigenetic origin of aberrant phenotypes in cauliflower is discussed with reference to epigenetic diseases described in human beings.
Main Authors: | Chable, Véronique, Rival, Alain, Beulé, Thierry, Jahier, Joseph, Eber, Frédérique, Cadot, Valérie, Boulineau, François, Salmon, Armel, Bellis, Henri, Manzanares-Dauleux, Maria J. |
---|---|
Format: | article biblioteca |
Language: | eng |
Subjects: | F30 - Génétique et amélioration des plantes, Brassica oleracea var. botrytis, http://aims.fao.org/aos/agrovoc/c_9403, http://aims.fao.org/aos/agrovoc/c_1098, http://aims.fao.org/aos/agrovoc/c_3081, |
Online Access: | http://agritrop.cirad.fr/552079/ http://agritrop.cirad.fr/552079/1/document_552079.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Accord cadre n.69-94. Etat territoire de Polynésie Française. CIRAD-FLHOR - Tubuai. Iles Australes. Programme d'activités 1997
by: Simon, Serge -
Accord cadre n.69-94. Etat territoire de Polynésie Française. Synthèse des autres activités du CIRAD-FLHOR à Tubuai. Iles Australes
by: Simon, Serge -
Les possibilités de la culture du chou-fleur aux Antilles. Résultats d'essais. Brassica oleracea botrytis D.C., famille des cruciféracées
by: Daly, Patrick -
Essai variétal chou-fleur
by: Simon, Serge -
Compte-rendu de mission. Participation à la réunion annuelle du groupe cultures potagères du département des Ressources Génétiques et de l'Amélioration des Plantes de l'INRA Rennes, 21 novembre 1995
by: De Bon, Hubert