o:8884 Selection of sessile oak (Quercus petraea (Matt.) Liebl.) plus trees for seed orchard establishment Selekcija plus stabala hrasta kitnjaka (Quercus petraea (Matt.) Liebl.) za potrebe osnivanja semenske plantaže en Abstract: The results of selection of plus trees of sessile oak (Quercus petraea (Matt.) Liebl.) as a base for establishing a seed orchard are presented in this paper. The research included 86 trees of phenotypically highest quality, selected based on morphological and physiological criteria, in order to preserve and improve the genetic diversity of the species. Morphological characteristics of leaves and acorns were analysed, including dimensions, mass and the ratio of certain parameters. The results of one-way analysis of variance showed that there are statistically significant differences among the trees for all observed characteristics (p < 0.01), which indicates a high level of genetic and morphological variability. The obtained results confirm that selected plus trees represent a suitable source of reproductive material for establishment of seed orchard of sessile oak. This way a basis for long-term conservation of genetic potential and adaptive capacity of the species is created. Keywords: Quercus petraea, plus trees, morphological variability, acorn, leaf, seed orchard, genetic diversity 1552099 10.5937/SustFor2592011P 1552101 1821-1046 2025-12-30T09:28:46.875Z 44 yes 46 Vladan Popović 0000-0003-4326-3364 46 Sanja Lazić 0000-0001-9468-2628 46 Aleksandar Lučić 0000-0002-4473-1791 46 Ljubinko Rakonjac 0000-0002-8736-6771 46 Radojica Pižurica 0009-0005-1770-6741 46 Boris Ivanović 46 Aleksandra Petrović application/pdf 658818 https://unilib.phaidrabg.rs/o:8884 no yes 16 70 92000001 71A07 Sustainable Forestry 92 11 27 Belgrade Institute of forestry 2025