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Genetic differentiation in ponderosa pine pinus ponderosa var scopulorum along a steep elevational transect



Genetic differentiation in ponderosa pine pinus ponderosa var scopulorum along a steep elevational transect



Silvae Genetica 29(3-4): 100-103



Data are reported for 7 enzyme polymorphisms in ponderosa pine, P. ponderosa Laws. var. scopulorum Engelm, in 3 ecologically different localities along a steep elevational transect in the Front Range of Colorado (USA). The highest and lowest sites of the transect differ by almost 1000 m in elevation, but they are only 3 km apart. Heterozygote excesses associated with slope aspect are found at a peroxidase locus and clinal differentiation is evident at a phosphoglucomutase locus. Linkage disequilibrium, a measure of non-random association of genotypes at separate loci, is found at each of the localities.

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