Table 2 Mean and variance for percent tuber dry matter, tuber eye depth and uniformity of tuber shape for breeding clones and cultivars using a scale ranging from 1 (non-uniform) to 9 (uniform) for tuber shape uniformity, from 1 (deep) to 9 (shallow) for tuber eye depth, and 1 (low) to 9 (high) for percent dry matter content in tubers

From: Diversity and population structure of Nordic potato cultivars and breeding clones