Ecological genetics of Pinus contorta in the upper Snake River Basin of eastern Idaho and Wyoming.

Abstract

Analyses of variables reflecting growth potential, morphology, cold hardiness, and periodicity of shoot elongation revealed population differentiation for a variety of traits. Regression models related as much as 83% of the variance of population means to the elevation and geographic location of the seed source. For genetic variation to be arranged along relatively steep environmental clines implies pronounced adaptive differentiation.-from Author