Resumen
- Solanum tuberosum is the fourth most important crop food in the world and is consumed by people worldwide either as a non-grain staple or as a vegetable. The major proportion of potatoes in the group Andigenum are autotetraploid (2n=4x=48), highly heterozygous with tetrasomic inheritance, and have tuber dormancy. Potatoes can also be diploids (2n=2x=24) with short vegetative period, presenting small tubers and lacking dormancy. In Colombia, part of the potato diversity is maintained in Colombian Ce ntral Collection (CCC). The appropriate use of these genetic resources depends on the understanding of their phenotypic and genetic diversity. The combination of molecular and morphological data is possible to map simple or complex traits and subsequently to identify candidate genes associated with traits of interest for plant breeding. In the present study, a genetic analysis using SNPs markers was conducted in the CCC in order to determine their genetic diversity and their utility to implement Association-mapping studies. : 809 accessions of Colombian Central Collection were genotyped using the Infinium 8303 SNP array and genotype calls were assigned in GenomeStudio software. Genetic diversity and genetic structure were estimated using genetic indexes as observed and expected heterozygosity and FST values in every main population obtained in Structure software.