Abstract
Big sagebrush (Artemisia tridentata) and its allies (subgenus Tridentatae) form a widespread and successful western North American plant group. Natural hybridization apparently has been important in the differentiation and success of this group. Controlled hybridization, although difficult to achieve, was shown to be successful through detection and assay of chemical markers. Artificial and natural hybridization success between subspecies tridentata and vaseyana was demonstrated by analysis of putative hybrid and parental populations. Coumarins, monoterpenoids, and morphological characteristics were analyzed with analysis of variance, the Kruskai-Wallis H test, and principal components analysis. Hybridization in Tridentatae is important not only in the evolution of taxa but potentially in the production of desirable genotypes for artificial selection.
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