Abstract
Samples of Juniperus thurifera L. were collected from the Atlas Mts., Morocco, northern and southern Spain, the Pyrenees, France, Fench Alps and Corse Isaland, France. The leaf oils were analyzed and found to be polymorphic for several major compounds (sabinene, limonene, linalool, piperitone, linalyl acetate and sesquiterpenes). In general, the Moroccan trees were higher in sabinene, γ-terpinene, cis-sabinene hydrate and terpinen-4-ol, but lower in limonene, δ-2-carene, and piperitone than trees from Europe. Analysis based on Random Amplified Polymorphic DNAs (RAPDs) for the aforementioned population plus J. foetidissima (as an outgroup), revealed that the Moroccan J. thurifera populations were most similar to plants from southern Spain, then to populations from France. Although the trees generally clustered by populations, there appear to be some differentiation in the RAPDs between the European J. thurifera populations and the Moroccan populations. Combining previous studies on seeds per cone, proanthrocyanidins, and the current report on the leaf essential oils and RAPDs, there is some support for the continued recognition of J. thurifera var. africana Maire [syn.: J. Africana (Maire); J. thurifera ssp. africana (Maire) Gauquelin, Hassani et Lebreton] in Algeria and Morocco.
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