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UPGMA cluster analysis of the accessions performed for a the average expert-based similarities, and b the average molecular marker-based similarities. Accessions are displayed by their CGN accession identifier, preceded by their registered subgroup classification (But butterhead, Cos cos, Lat Latin, Cut cutting, Cri crisphead, Sta stalk, Oil oilseed, Lse L. serriola). Groups of accessions that clustered according to subgroup classification are indicated in the right margin
