Maypan coconut palm

Maypan coconut palm

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Maypan is an F1 hybrid
F1 hybrid
F1 hybrid is a term used in genetics and selective breeding. F1 stands for Filial 1, the first filial generation seeds/plants or animal offspring resulting from a cross mating of distinctly different parental types....

 coconut
Coconut
The coconut palm, Cocos nucifera, is a member of the family Arecaceae . It is the only accepted species in the genus Cocos. The term coconut can refer to the entire coconut palm, the seed, or the fruit, which is not a botanical nut. The spelling cocoanut is an old-fashioned form of the word...

 [palm] that was developed by the Research Department of the Coconut Industry Board of Jamaica to be resistant to Lethal Yellowing
Lethal yellowing
thumb|Palm tree dying of lethal yellowingLethal Yellowing is a phytoplasma disease that attacks many species of palms, including some commercially important species such as the Coconut and Date Palm. It is spread by the planthopper Haplaxius crudus which is native to Florida, parts of the...

 disease . It was created experimentally in 1962 by cross pollinating two varieties of Cocos nucifera and, after extensive disease exposure and yield performance trials, was named and released in 1974 when a suitable method of mass controlled pollination had been devised . A DwarfxTall hybrid P.K. Thampan. 1981. Handbook on Coconut Palm. Oxford & IBH Publishing Co., the Malayan Dwarf
Malayan Dwarf
The Malayan Dwarf is a variety of coconut palm. The palm is classified based on the nut color: ivory yellow nuts, apricot red nuts, and green nuts . The palm's resistance to the Lethal Yellowing disease is the characteristic that makes it to be one of the important dwarf types in the world...

 seed parents, grown in an isolated seed garden and kept constantly emasculated, are regularly pollinated by blowing a mixture of talc and pollen
Pollen
Pollen is a fine to coarse powder containing the microgametophytes of seed plants, which produce the male gametes . Pollen grains have a hard coat that protects the sperm cells during the process of their movement from the stamens to the pistil of flowering plants or from the male cone to the...

 collected from selected palms of a variety known locally as Panama Tall. This combination gives the Maypan an LY disease resistance approaching that of the Malayan Dwarf and much of the windstorm tolerance of the Panama Tall. It grows to approximately 18 meters in height. The LY resistance of the Maypan, of both of its parents, and of other coconut varieties generally, has been called into question since the 1990s but Maypan, and F1 hybrids using the same types of parents, are still the planting material of choice in the Caribbean and Latin American countries where LY occurs.