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Outcrossing rates in a natural stand and in a seed orchard of Pinus peuce

P. Zhelev , D. Gömöry, L. Paule

P. Zhelev
Dep. of Dendrology, University of Forestry, 1756 Sofia, Bulgaria. Email: zhelev@ltu.bg
D. Gömöry
Dep. of Phytology, Faculty of Forestry, Technical University, 96 053 Zvolen, Slovakia
L. Paule
Dep. of Phytology, Faculty of Forestry, Technical University, 96 053 Zvolen, Slovakia

Online First: February 10, 2008
Zhelev, P., Gömöry, D., Paule, L. 2008. Outcrossing rates in a natural stand and in a seed orchard of Pinus peuce. Annals of Forest Research 51(1): 159.


The mating system parameters were studied in a natural stand and in a seed orchard of the Balkan endemic, Pinus peuce Griseb. by
means of isozyme gene markers. The results indicate that the multilocus estimates of the outcrossing rates are low relative to other
widespread conifers but concord to these reported for other pine species with limited area of distribution. No significant differences
were detected between the natural stand and the seed orchard estimates. Multilocus estimates of outcrossing rate were within the range
0.77-0.79, while mean single-locus estimates were lower (0.69-0.73). The results indicate that at least 20% of the progeny of Pinus peuce
is due to self-fertilization. Possible reasons for the results observed and the implications for tree breeding and gene conservation are discussed.


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  • P. Zhelev
  • D. Gömöry
  • L. Paule
  • P. Zhelev
  • D. Gömöry
  • L. Paule