New Forests

, Volume 20, Issue 1, pp 87-104

First online:

A model integrating seed source adaptation and seed use

  • D. LindgrenAffiliated withDepartment of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
  • , C.C. YingAffiliated withResearch Branch, B.C. Ministry of Forests

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A conceptual model that considers theperformance (adaptability) of a seed source (=anorigin) and the location or range of its deployment isdeveloped employing the Cauchy function. The modelassumes that there exists an optimal site type foreach provenance origin (genetic material), and thatloss in performance is a function of the “distance” (ameasure of increasing maladaptation) from the optimalsite. The model requires the estimate of threeparameters: a site requirement value that measuressite type in one dimension; a measure of optimalperformance; and a flexibility measure of the width ofseed source adaptability. The Cauchy function has aknown integral, thus the average adaptability over arange (a possible seed use zone) can be mathematicallyevaluated. The model was also extended to seed orchardcrops representing progeny of parents of variableorigins. Scots pine information in Sweden was used todemonstrate possible applications of the model.

adaptability seed zone provenance seed orchard Scots pine