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Adding value to cocoa (Theobroma cacao L.) germplasm information with domestication history and admixture mapping

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Abstract

A sound understanding of crop history can provide the basis for deriving novel genetic information through admixture mapping. We confirmed this, by using characterization data from an international collection of cocoa, collected 25 years ago, and from a contemporary plantation. We focus on the trees derived from three centuries of admixture between Meso-American Criollo and South American Forastero genomes. In both cacao sets of individuals, linkage disequilibrium extended over long genetic distances along chromosome regions, as expected in populations derived from recent admixture. Based on loose genome scans, genomic regions involved in useful traits were identified. Fifteen genomic regions involved in seed and fruit weight variation were highlighted. They correspond to ten previously identified QTLs and five novel ones. Admixture mapping can help to add value to genetic resources and thus, help to encourage investment in their conservation.

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Acknowledgments

We thank P. Bretting, R. Marckam, T. Hodgkins and E. Rosenquist for providing helpful comments on the manuscript. We thank the Centre de Coopération Internationale en Recherche Agronomique pour le Développement CIRAD, Fonds Interprofessionnel de la Recherche sur le Cacao FIRC, Ministère des Affaires Etrangers, France and Fondo Nacional para la Ciencia y la Tecnología FONACIT, Venezuela, for their financial support.

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Authors and Affiliations

  1. Centre de Coopération Internationale en Recherche Agronomique pour le Développement, (CIRAD) TA 40/03, 34398, Montpellier Cedex 5, France

    Maria Marcano, Tatiana Pugh, Emile Cros, Elvis A. Portillo Páez, Brigitte Courtois, Jean Christophe Glaszmann, Ange Marie Risterucci, Olivier Fouet & Claire Lanaud

  2. Laboratorio de Genética y Química Celular (GEQUIMCEL), Universidad de los Andes (ULA), La Hechicera, Mérida, Edo. Mérida, Venezuela

    Maria Marcano, Sonia Morales & Manuel Dagert

  3. Facultad de Agronomía, Universidad Central de Venezuela (UCV), Av. El Limón, Maracay, 2101, Edo. Aragua, Venezuela

    Tatiana Pugh

  4. Facultad de Agronomía. Maracaibo, Universidad del Zulia (LUZ), Edo Zulia, Venezuela

    Elvis A. Portillo Páez

  5. Bioversity International, Via dei Tre Denari, 472a, 00057, Maccarese, Rome, Italy

    Jan M. M. Engels

  6. Centro Agronómico Tropical de Investigación y Enseñanza, P.O. Box 7170, CATIE, Turrialba, Costa Rica

    Wilbert Phillips & Carlos Astorga

  7. Instituto Nacional de Investigaciones Agrícolas, INIA–CENIAP, Av. Universidad, Maracay, 2101, Edo. Aragua, Venezuela

    Ventura González

  8. VALRHONA, Les lots, 26600, Tain L’ hermitage, France

    Kai Rosenberg & Isabelle Vallat

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  1. Maria Marcano
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  2. Tatiana Pugh
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  3. Emile Cros
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  6. Brigitte Courtois
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  7. Jean Christophe Glaszmann
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  8. Jan M. M. Engels
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  9. Wilbert Phillips
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  10. Carlos Astorga
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  11. Ange Marie Risterucci
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  12. Olivier Fouet
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  13. Ventura González
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  14. Kai Rosenberg
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  15. Isabelle Vallat
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  16. Manuel Dagert
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  17. Claire Lanaud
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Corresponding author

Correspondence to Maria Marcano.

Additional information

Communicated by J.-L. Jannink.

Maria Marcano and Tatiana Pugh contributed equally to this work.

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Marcano, M., Pugh, T., Cros, E. et al. Adding value to cocoa (Theobroma cacao L.) germplasm information with domestication history and admixture mapping. Theor Appl Genet 114, 877–884 (2007). https://doi.org/10.1007/s00122-006-0486-9

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  • DOI: https://doi.org/10.1007/s00122-006-0486-9

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