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ARS Home » Southeast Area » Miami, Florida » Subtropical Horticulture Research » Research » Publications at this Location » Publication #296204
Title: Toward The identification Of candidate genes involved in black pod disease resistance in Theobroma cacao L.

Author
item ROYAERT, STEFAN - M & M Mars Company - Brazil
item MOORE, JOHN - M & M Mars Company - United States
item SANTOS ARAUJO, IONA - Federal Rural University Of The Semi-Arid
item VIANA DA SILVA, DANIELA - University Of Santa Cruz - Brazil
item MARTINS DE JESUS, SAMUEL - University Of Santa Cruz - Brazil
item LIVINGSTONE III, DONALD - M & M Mars Company - United States
item MARELLI, JEAN-PHILIPPE - M & M Mars Company - Brazil
item Kuhn, David
item Gutierrez, Osman
item CORREA, RONAN XAVIER - University Of Santa Cruz - Brazil
item SCHNELL, RAYMOND - M & M Mars Company - United States
item MOTAMAYOR, JUAN CARLOS - M & M Mars Company - United States

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 1/1/2013
Publication Date: 1/11/2013
Citation: Royaert, S., Moore, J.M., Santos Araujo, I., Viana Da Silva, D., Martins De Jesus, S., Livingstone Iii, D., Marelli, J., Kuhn, D.N., Gutierrez, O.A., Correa, R., Schnell, R.J., Motamayor, J. 2013. Toward The identification Of candidate genes involved in black pod disease resistance in Theobroma cacao L.. Meeting Abstract. Plant & Animal Genome XXI Conference, San Diego, CA January 12-16, 2013.

Interpretive Summary:

Technical Abstract: Increasing yield, quality and disease resistance are important objectives for cacao breeding programs. Some of the diseases, such as black pod rot (Phytophtora spp), frosty pod (Moniliophthora roreri) and witches’ broom (M. perniciosa), produce significant losses in all or in some of the various production areas around the world. We recently identified associations for witches’ broom (WB) resistance (cushion brooms, more specifically) using 185 simple sequence repeat (SSR) markers and a segregating mapping population of 282 trees at the Mars Center for Cocoa Science (Brazil) between ‘TSH-1188’ (WB resistant) and ‘CCN-51’ (WB tolerant). Later, a more extensive set of trees (459) of the same mapping population has been genotyped with 6,000 SNPs. Phenotypic data including vegetative brooms and cushion brooms for this population was collected from 2008 to 2011 and SNP markers were associated with the different traits. The resulting fine map (3,526 SNPs, 852.8 cM) allowed us to identify significant associations for vegetative and cushion brooms, mainly on linkage groups 9, 6 and 4, and some minor associations on linkage groups 7 and 3. Further strategies, such as phasing of the parents and the offspring in order to reduce the size of the associated regions will be presented. The goal is to identify markers for Marker-Assisted-Breeding, and ultimately identify candidate genes involved in witches’ broom resistance.