Table 4 Cluster number determination from k-means testing
kPhenotypicGenetic
244.836.7
361.5*47.6
471.861.9*
576.069.3
683.479.2
785.283.3
  • Results for k-means testing of phenotypic and genetic correlation matrices using the average of the Lloyd (1982) and Hartigan and Wong (1979) algorithms. Hypothesized cluster number is the k-value input into the heuristic. Numbers reported for the phenotypic and genetic matrices are the average of the two algorithms’ results for the ratio of the between-groups sum-of-squares to the total sum-of-squares. The point at which the curve was determined to have its “elbow” is indicated with an asterisk.