Abstract
Summary A combined provenance/progeny trial of native Pinus sylvestris populations was established on a site in southern Scotland in 1991. Four provenances (Abernethy, Glen Affric, Loch Maree and Rannoch) were chosen to represent the range-wide geographical variation for this species within Scotland. At three years after outplanting (7 years of age) the quantitative traits of spring vegetative bud burst, height and diameter were measured. Significant genetic variation was detected among provenances for most of the quantitative traits analysed. Glen Affric provenance showed poor height and diameter growth, while Abernethy provenance burst its buds approximately one week later than the remaining provenances. For the morphological traits measured a genetic basis for within provenance variation was demonstrated. The coefficient of genetic variation (CG) and heritability estimates (h2) suggest that the genetic resource for growth traits within populations is still high (CG = 9.3–16.7%). In contrast the populat...
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