Average composition (%) of the representative compounds of each group of chemicals selected by the stepwise discriminant analysis.

Groups are numbered from 1 to 5 depending on their degree of explanation of the variation among sibling populations.1Retention Indexes calculated on DB-5 column.2Verified with synthetic compounds.3STEPDISC procedure Stepwise selection among chemicals between General Bureau (N = 10) and Waldin (N = 8) siblings.