Genetic gain Breeding population size =48, SPM, progeny size = 50, GMS selection, high heritability, after five generations 0 10 20 30 40 50 60 70 80 0246810121416 Gene diversity (status number) in the breeding population Seed orchard (production population) Breeding population based on Rosvall 1999 Conclusions: * Gene diversity in the breeding population makes it more able to support production populations Much unbalance No unbalance
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