The Panama Tall and the Maypan hybrid coconut in Jamaica: did genetic contamination cause a loss of resistance to Lethal Yellowing?
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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.
KeywordsCoconut Lethal Yellowing Phytoplasma Genetic control Microsatellites
Station marc delorme, Centre National de la Recherche Agronomique (Côte d’Ivoire)
Coconut industry board (Jamaica)
Centro de investigation Cientifica de Yucatan
Fundación para la Autonomía y el Desarollo de la Costa Atlántica de Nicaragua (Nicaragua)
We thank IPGRI and the Cogent network, which financed the development of the coconut cultivar identification kit, and the Genotyping Platform of the Languedoc Roussillon Genopole, hosted by Cirad (C. Billot and R. Rivallan) were all the SSr data have been obtained.
- Baudouin L, Lebrun P (2002) The development of a microsatellite kit and dedicated software for use with coconuts. Burotrop Bull 17:16–20Google Scholar
- Been BO (1981) Observations on field resistance to lethal yellowing in coconut varieties and hybrids in Jamaica. Oléagineux 36:9–12Google Scholar
- Broschat TK, Harrison NA, Donselman H (2002) Losses to lethal yellowing cast doubt on coconut cultivar resistance. Palms 46:185–189Google Scholar
- Lebrun P, Baudouin L, Myrie W, Berger A, Dollet M (2007) Recent Lethal Yellowing outbreak: why is the Malayan Yellow Dwarf Coconut no longer resistant in Jamaica? Tree Genetics & Genomes, doi: 10.1007/s 11295-007-0093-1
- Lebrun P, Berger SA, Hodgkin T, Baudouin L (2005) Biochemical and molecular methods for characterizing coconut diversity. In: Batugal PA, Ramanatha Rao V, Oliver J (eds) Coconut genetic resources. International Plant Genetic Resources institute—Regional office for Asia, the Pacific and Oceania (IPGRI-APO), Serdang, pp 225–251Google Scholar
- Lebrun P, N’Cho YP, Bourdeix R, Baudouin L (2003) Coconut. In: Hamon P, Seguin M, Perrier X, Glaszmann J-C (eds) Genetic diversity of cultivated tropical plants. SPI and Cirad, Enfield (NH) and Plymouth UK, pp 219–238Google Scholar
- Santos GA, Batugal PA, Othman A, Baudouin L, Labouisse JP (1996) Manual on standardized research techniques in coconut breeding. IPGRI, Cogent. p 46Google Scholar