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. 2018 Oct 23;9:1510. doi: 10.3389/fpls.2018.01510

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Copyright © 2018 Welling, Liu, Raymond, Ansari and King.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Non-hierarchical k-means cluster analysis criterion values as a function of clusters. (B) Non-hierarchical k-means tripartite cluster analysis for the F_dicyclic chemotypic values across vegetative and maturation developmental stages. (C) Non-hierarchical k-means tripartite cluster analysis for the F_C3 values across vegetative and maturation developmental stages. Red arrow indicates optimal number of clusters for the F_dicyclic as well as the F_C3 chemotypic values; Blue triangle indicates low cannabinoid fraction cluster; Yellow square indicates intermediate cannabinoid fraction cluster; Orange diamond indicates high cannabinoid fraction cluster; C₃-alkyl cannabinoid fractions (F_C3); C₅-alkyl cannabinoid fractions (F_C5); and dicyclic cannabinoid fractions (F_dicyclic).