%0 Article
%T Investigation methods in forest tree population studies
%A Chudnyi, A. V.
%D 1974
%J Silva Fennica
%V 8
%N 1
%R doi:10.14214/sf.a14741
%U https://silvafennica.fi/article/4897
%X <p>From the tree breeder’s point of view, an investigation of the chemical compounds in a tree population is worthwhile, if sufficiently high correlations exist between the chemical composition and any economical important characteristics. In Scots pine (<em>Pinus sylvestris</em> L.) populations, such a correlation seems to exist between a high α-pinene and a low Δ<sup>3</sup>-carene content on the one hand, and the poor resistance to <em>Fomitopsis annosa</em> Fr. (now <em>Heterobasidion annosum&nbsp;</em>(Fr.) Bref.) but a rapid development during the first half of the life cycle on the other hand. Detailed investigation on the terpene contents in pine populations were conducted at 121 locations throughout the Soviet Union. As a result, the range of this species was divided into zones, each of which was characterized by a distinct terpene composition pattern. In continuing selection and breeding work, the terpene contents are being used as indicators when the variation of economically important characteristics of Scots pine populations is studied.</p>
<p>The PDF includes a summary in English.</p>