%0 Article
%T Geographic variation in forest trees.
%A Prokazin, E. P.
%D 1980
%J Silva Fennica
%V 14
%N 1
%R doi:10.14214/sf.a15005
%U https://silvafennica.fi/article/5064
%X <p>Planting of forest trees takes place in USSR on millions of hectares but without permanent forest seed bases having yet been established in every region of the country. Consequently, local seed does not suffice the need, and it is necessary to secure it from other geographical regions. To avoid negative consequences of seed transfer it is necessary to study geographic variation of the genetic characteristics of forest trees and construct scientifically based division into seed zones. Geographic transfer of seed can also be regarded as a breeding measure. A large research program is being carried out in the USSR on the subject. Most of the existing trials are provenience tests of Scots pine (<em>Pinus sylvestris</em> L.). Over 2,000 hectares of new provenience experiments is to be established in near future.</p>
<p>The PDF includes a summary in Finnish.</p>