Effective population number estimation of three scots pine (pinus sylvestris L.) seed orchards based on an integrated assessment of flowering, floral phenology, and seed orchard design : International Journal of Forest Genetics

2000

S. 65-75

6 Tab., 25 Lit.

Unselbständiges Werk

200064714

Male and female gametic contributions of clones were estimated on the basis of observations of male strobili and cone numbers, reproductive phenology, and clone dislocation in three Scots pine seed orchards in central Slovakia. Among the ramets in the investigated seed orchards, 15-35 % are planted on wrong positions and 12-27 % represent alien genotypes. A large variation of gametec contributions and sexual asymmetry was found. Inbreeding effective population numbers varied from 28.6 % to 59.3 % of the census number of clones, whereas the relative status numbers ranged from 48.4 % to 72.4 %. A concept of ideal status number of the seed orchard crop was developed. Relative status numbers of the crop varied between 45.3 % and 69.4 %. The smallest effective population size were observed in the youngest seed orchard Kolkáren, despite the highest census number of clones.