Application of model for tree breeding to conifers in southern Sweden

We propose a long-term breeding program for Norway spi-uce and Scots pine in southern Swcdcn based on a model. presented in a parallel paper. For the establishment of the long-tern1 breeding population we propose three founder populations for Norway spruce. one of Swedish origin. the others from the Carpathian mountain range and Whitc R~~ssrieas pectively. Only one founder population. Swedish. is proposed for Scots pine but we suggest further exploration of foreign sources. For all founder populations we sho~ildli ke two pal-allel schemes. One should be based on subpopulations consisting of 30 to 40 parents each. the other based on selfed Imes. In the first alternative. problems with inbreeding depression are avoded: in the second. we intend to purge detrimental genes by inbreeding. The subpopulations will cover southern Sweden. that is. from the south up to 62" latitude It is suggested that the Institute of Forest Tree Improvcnicnt takes care of the long-term breeding populations. We consider the long-term breeding effort to be an important means of managing the country's biological resources. and therefore consider it proper for the government to fund the program.