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Clustering of Accessions by Developmental Stage.
Two-way cluster analysis of analytical signatures from P. trichocarpa cuticular waxes. Samples (columns), labeled by leaf plastochron index (Leaf PI), and grouped into four clusters. Peaks (rows) grouped into seven clusters. an, alkane; en, alkene; 01, alcohol; ic, fatty acid. Unidentified analytical signals are labeled with the retention time in minutes. In the heat map, darker shades correspond to higher concentration of the compound.
