Fig. 3. Cumulative histograms (columns) and approximated normal distributions (curves) for (A) Euclidean or (B) Mahalanobis morphological distances based on 25 morphological traits for F₂–, BC₁–, and BC₂–derived progeny lines. Variables n, µ, and SD refer to the number of values, the mean, and the standard deviation of Mahalanobis distance values for the particular distribution, respectively.