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Genetic diversity of native cultivated cacao accessions (Theobroma cacao L.) in Nicaragua

Published online by Cambridge University Press:  27 November 2012

Erwin Aragon ,
Claudia Rivera ,
Helena Korpelainen ,
Aldo Rojas ,
Paula Elomaa  and
Jari P. T. Valkonen
Erwin Aragon
Affiliation:
Centro Nicaragüense de Investigación Agropecuaria y Biotecnología (CNIAB), Instituto Nicaragüense de Tecnología Agropecuaria (INTA), Km 14.1 North Highway, Managua, Nicaragua
Claudia Rivera
Affiliation:
Centro Nicaragüense de Investigación Agropecuaria y Biotecnología (CNIAB), Instituto Nicaragüense de Tecnología Agropecuaria (INTA), Km 14.1 North Highway, Managua, Nicaragua
Helena Korpelainen*
Affiliation:
Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Finland
Aldo Rojas
Affiliation:
Centro Nicaragüense de Investigación Agropecuaria y Biotecnología (CNIAB), Instituto Nicaragüense de Tecnología Agropecuaria (INTA), Km 14.1 North Highway, Managua, Nicaragua
Paula Elomaa
Affiliation:
Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Finland
Jari P. T. Valkonen
Affiliation:
Department of Agricultural Sciences, University of Helsinki, PO Box 27, FI-00014, Finland
*
*Corresponding author. E-mail: [email protected]
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Abstract

A total of 60 farmers' cacao accessions (Theobroma cacao L.) from Nicaragua were investigated using microsatellite markers to reveal their genetic composition and to identify potentially resistant genotypes against the black pod disease caused by Phytophthora palmivora. These accessions were compared with 21 breeders' accessions maintained locally, two Criollo accessions from Costa Rica and two accessions from Ecuador. The analyses showed a low level of differentiation among groups of farmers' accessions (FST = 0.06) and that six Nicaraguan accessions were genetically closely related to the two Criollo accessions used as a reference. In addition, seven distinct genotypes were found to have allelic composition that may indicate linkage to resistance alleles, thus being potential parental lines in future breeding programmes.

Keywords

farmers' and breeders' accessionsgenetic differentiationgenetic diversitymicrosatellitePhytophthora palmivoraresistance
Type
Short Communication
Information
Plant Genetic Resources , Volume 10 , Issue 3 , December 2012 , pp. 254 - 257
Copyright
Copyright © NIAB 2012

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