@article{Kerkez_Nonić_Devetaković_Šijačić-Nikolić_Ivetić_2018, title={The effect of half-sib lines on morphological attributes of one-year old Fraxinus angustifolia seedlings}, url={https://journal.reforestationchallenges.org/index.php/REFOR/article/view/88}, DOI={10.21750/REFOR.5.03.49}, abstractNote={<p>Aiming to produce forest reproductive material at the family level, we tested quality of twenty <em>Fraxinus angustifolia </em>Vahl half-sib lines in the nursery experiment. We measured height (HT) and root collar diameter (DIA) of one-year old seedlings, and we monitored germination rate and mortality during the first growing season. Seeds of 20 half-sib lines originating from Sombor area (north Serbia) were sown in seedbed on autumn 2016. The seed dormancy was not broken in all seeds equally, resulting with un-uniform germination over a two months period. All measured attributes shows a statistically significant differences, indicating a strong effect of genetic control. The highest average and DIA were measured in half-sib line 7 (22.62 cm; 5.79 mm, respectively). The lowest average DIA was measured in half-sib lines 18 (2.85 mm) and 19 (2.94 mm), which can be result of growing density effect (104 seedlings m<sup>-2</sup> for line 18 and 126 seedlings m<sup>-2</sup> for line 19, compared to 40 seedlings m<sup>-2</sup> for line 7). The correlation between DIA and HT is strong and positive (R=0.90). Due to its morphological superiority, half-sib line 7 could be recommended for mass production of <em>Fraxinus angustifolia </em>seedlings at the family level.</p> <p><strong>Keywords: </strong>Height; Root Collar Diameter; Seedlings Quality; Narrow leaved ash</p>}, number={5}, journal={REFORESTA}, author={Kerkez, Ivona and Nonić, Marina and Devetaković, Jovana and Šijačić-Nikolić, Mirjana and Ivetić, Vladan}, year={2018}, month={Jul.}, pages={15–21} }