Assessment of Genetic Diversity and Relatedness in an Andean Potato Collection from Argentina by High-Density Genotyping

SOFIA SUCAR; CARBONI, MARTÍN FEDERICO; MARIA FLORENCIA REY BURUSCO; CASTELLOTE, MARTÍN ALFREDO; MASSA GABRIELA ALEJANDRA; MONTE, MARCELO NICOLÁS; FEINGOLD SERGIO ENRIQUE

Horticulturae

MDPI

Año: 2022

2311-7524

Native potatoes are the most diverse among cultivated potato species and thusconstitute a valuable source for identifying genes for potato improvement. Nevertheless, highdensity mapping, needed to reveal allelic diversity, has not been performed for native Argentinianpotatoes. We present a study of the genetic variability and population structure of 96 Andigenapotatoes from Northwestern Argentina performed using a subset of 5035 SNPs with no missingdata and full reproducibility. These high-density markers are distributed across the genome andpresent a good coverage of genomic regions. A Bayesian approach revealed the presence of: (I) amajor group comprised of most of the Andean accessions; (II) a smaller group containing the outgroup cv. Spunta and the sequenced genotype DM; and (III) a third group containing colored fleshpotatoes. This grouping was also consistent when maximum likelihood trees were constructed andfurther confirmed by a principal coordinate analysis. A group of 19 accessions stored as Andeanvarieties clustered consistently with group Tuberosum accessions. This was in agreement withprevious studies and we hypothesized that they may be reintroductions of European-bred longday-adapted potatoes. The present study constitutes a valuable source for allele mining of genes ofinterest and thus provides a tool for association mapping studies