Article

Euphytica

, Volume 161, Issue 3, pp 353-360

First online:

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

  • Luc BaudouinAffiliated withCIRAD, Centre International de Recherches en Agronomie pour le Développement Email author 
  • , Patricia LebrunAffiliated withCIRAD, Centre International de Recherches en Agronomie pour le Développement
  • , Angélique BergerAffiliated withCIRAD, Centre International de Recherches en Agronomie pour le Développement
  • , Wayne MyrieAffiliated with
  • , Basil BeenAffiliated with
  • , Michel DolletAffiliated withCIRAD, Centre International de Recherches en Agronomie pour le Développement, Campus international de Baillarguet

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Abstract

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 off-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 insufficient 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.

Keywords

Coconut Lethal Yellowing Phytoplasma Genetic control Microsatellites