SNP markers associated with resistance to frosty pod and black pod rot diseases in an F1 population of Theobroma cacao L.

Abstract Economically, cacao ( Theobroma L.) is a major tropical commodity for the Americas; however, severe losses due to Moniliophthora roreri (Cif. and Par.), which causes frosty pod rot (FPR), Phytophthora spp., black (BPR), have reduced production in Americas. The objectives of this study are (i) re-confirm QTL using different marker set; (ii) discover new associated with FPR BPR resistance SNP markers; (iii) find genes candidate regions. At CATIE Turrialba, Costa Rica, an F 1 mapping population was obtained by crossing “POUND 7,” clone moderately susceptible resistant BPR, “UF 273,” highly BPR. A total 179 progeny were fingerprinted 5149 markers dense linkage map composed 10 groups developed 2910 polymorphic markers. Also segregating trees screened diseases. Seven previously reported on chromosomes 2, 7, 8 4, 8, confirmed. Additionally, eight identified (chromosomes 9, 10) (chromosome 2). expression commonly plant defense disease that located within