The Panama Tall and the Maypan hybrid coconut in Jamaica : Did genetic contamination cause a loss of resistance to Lethal Yellowing?

Baudouin Luc, Lebrun Patricia, Berger Angélique, Myrie Wayne, Been Basil, Dollet Michel. 2008. The Panama Tall and the Maypan hybrid coconut in Jamaica : Did genetic contamination cause a loss of resistance to Lethal Yellowing?. Euphytica, 161 (3) : 353-360.

https://doi.org/10.1007/s10681-007-9568-2

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Résumé : We applied Bayesian population assignment methods to assess the trueness to type of four populations of the coconut cultivar Panama Tall (PNT) located in Jamaica and found that two of them presented a high percentage of oV-types, while genetic contamination was low in the two others. The PNT is the pollen parent of the MAYPAN hybrid, which used to be planted in Jamaica to control an epidemic disease: Lethal Yellowing. The main source of contamination was the susceptible Jamaica Tall, thus increasing the susceptibility in the resulting MAYPAN progeny. The incidence of genetic contamination seems however to be insuYcient to be the only cause of the latest outbreak of the disease. Neither the MAYPAN nor its parents can be said resistant in the present context of Jamaica.

Mots-clés Agrovoc : Cocos nucifera, résistance aux maladies, hybride, impact sur l'environnement, phytoplasme, microsatellite, contamination biologique, flux de gènes

Mots-clés géographiques Agrovoc : Jamaïque

Mots-clés complémentaires : Jaunissement mortel

Classification Agris : F30 - Génétique et amélioration des plantes
H20 - Maladies des plantes
P02 - Pollution

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

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