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United States Department of Agriculture

Agricultural Research Service

Research Project: Genetic Improvement of Cacao Through Genomics-Assisted Breeding

Location: Subtropical Horticulture Research

Title: Integrating genomics into future approaches for cocoa selection and propagation in Côte d’Ivoire

Authors
item Pokou, Desire -
item Tahi, M -
item Gutierrez, Osman
item Motamayor, Juan Carlos -
item Schnell, Raymond -
item Brown, P -

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: October 15, 2012
Publication Date: October 20, 2012
Citation: Pokou, D., Tahi, M., Gutierrez, O.A., Motamayor, J., Schnell, R.J., Brown, P. 2012. Integrating genomics into future approaches for cocoa selection and propagation in Côte d’Ivoire. Meeting Abstract. Seven INGENIC Workshop, Yaounde, Cameroon, October 21-22, 2012.

Technical Abstract: In Côte-d’Ivoire cocoa breeding is based on a reciprocal recurrent scheme that has been prepared with the aim of improving simultaneously the characteristics of the two main populations: Upper Amazon and Lower Amazon+ Trinitario. Resistance to Phytophtora and Cacao Swollen Shoot Virus has become the main focus of the breeding program. The development of SSR markers linked to resistance genes has been carried out during this decade to identify QTLs for resistance to diseases such as Black Pod, Frosty Pod and Witches’ Broom. Black Pod is spreading in West Africa where 70 % of world cocoa is produced: on the other hand, Frosty Pod and Witches’ Broom are located in the Americas but are still a threat to West Africa. The objective of genomics assisted breeding in Côte-d’Ivoire is to develop varieties with resistance to diseases currently affecting the production in West Africa, as well as to other potential treats. New mapping populations are being created to identify additional QTLs. The utility of Association Mapping for quantitative traits has been demonstrated, providing an alternative method to traditional mapping. More recently, the development of SNPs facilitated genetic mapping and fingerprinting. SNPs are being used to certify the quality of crosses made in seed gardens to produce the planting material for farmers.

Last Modified: 7/30/2014
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