Genetic variation and realized genetic gain from Aleppo pine treeimprovement

摘要

In January 1987 a 10 ha clonal seed orchard of Aleppo pine (Pinus halepensis MILL.) was established in the area Amphilochia, Greece. The orchard comprises 76 clones derived from intensively selected trees in the natural forests of Euboia island. In November 1986, two open pollinated progeny tests were established in central west Greece proximal to Nafpaktos and Stamna. Seedlings from 63 to 70 families, including a commercial check, were planted at the Stamna and Nafpaktos: locations, respectively. One year later (SPRING, 1988) an additional planting including 32 families plus the commercial check was established in the area of Limni on Euboia island. Assessments were made in 1997 when trees were 10 years (Nafpaktos and Stamna) and 9 years (Limni) from planting and the following results were obtained.