Additional file 4: of Use of easy measurable phenotypic traits as a complementary approach to evaluate the population structure and diversity in a high heterozygous panel of tetraploid clones and cultivars

Principal Component Analysis from SNPs markers. Axis 1 (10%) and Axis 2 (5, 9%) explained 16% of total variation. Minimum Spanning Tree corresponding to the distance matrix was added. Each dot symbolized a unique genotype. Dot colors symbolize the a priori grouping as follows: green (interspecific hybrids), grey (CIP clones), pink (North America varieties), black (INTA clones and varieties), yellow (diploid genotypes), red (Group Andígena), violet (Europe-Asia varieties), turquoise (South America varieties). (PNG 16 kb)