Suchergebnisse

I Tree Breeding -- invited guest lecture: The Population Genetic Basis of Breeding Theory -- Hybridisation and Cytogenetics of European Birches -- II Mating Systems -- invited guest lecture: Mating System Estimation in Forest Trees: Models, Methods and Meanings -- invited guest lecture: Understanding the Genetic Structure of Plant Populations: Some Old Problems and a New Approach -- invited guest lecture: Inbreeding and Selection in Natural Populations -- Polymorphic Equilibria Under Inbreeding Effects and Selection on Components of Reproduction -- Mating System Dynamics in a Scots Pine Seed Orchard -- Reproductive Success of Genotypes of Pinus sylves-tris L. in Different Environments -- Multilocus Analysis of External Pollen Contamination of a Scots Pine (Pinus sylvestris L.) Seed Orchard -- Gene Dispersion and Selfing Frequency in a Seed-Tree Stand of Pinus sylvestris (L.) 1 -- invited guest lecture: Genetic Constraints on the Evolution of Plant Reproductive Systems -- invited guest lecture: Evolution of Outbreeding Systems -- III Genetic Differentiation Within and Between Populations -- The Effects of Forest Management on the Genetic Variability of Plant Species in the Herb Layer -- Studies on Breeding Structure in Two Tropical Tree Species -- A Multilocus Study of Natural Populations of Pinus sylvestris -- Genetic Effects of Scots Pine (Pinus sylvestris L.) Domestication -- Genetic Differentiation Among Scots Pine Populations From the Lowlands and the Mountains in Poland -- Effects of Selection Pressure by SO2 Pollution on Genetic Structures of Norway Spruce (Picea abies) -- Measurement of Genetic Differentiation in Plant Populations -- List of contributors.

Air pollutants provide environmental conditions that drastically differ in many respects from those to which forest trees are naturally adapted. Leading experts in the field here consider these questions of immediate relevance arising from the changing environment: (1) Do air pollutants introduce effects of selection that differ from those known for populations that are not subject to such stress conditions? (2) If air pollutants introduce quantitatively or even qualitatively novel selective effects, which consequences might arise from the adaptation of forest tree populations to the present conditions as well as for the preservation of adaptability to future conditions? In addition to these questions, concepts for preservation of genetic resources are discussed