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ŠUMARSKI LIST 7-8/2014 str. 27     <-- 27 -->        PDF

VARIATION IN LEAF PHOTOSYNTHETIC TRAITS OF WILD CHERRY (Prunus avium L.) FAMILIES IN A NURSERY TRIAL
VARIJABILNOST FOTOSINTETIČKIH OSOBINA LISTA PORODICA DIVLJE TREŠNJE (Prunus avium L.) U RASADNIČKOM POKUSU
Saša ORLOVIĆ, Srđan STOJNIĆ, Andrej PILIPOVIĆ, Saša PEKEČ, Milan MATARUGA, Branislav CVJETKOVIĆ, Danijela MILJKOVIĆ
Summary
The paper presents the results of investigation of variability of net photosynthesis (A), transpiration (E), stomatal conductance (gs) and water use efficiency (WUE) in one year old seedlings of wild cherry (Prunus avium L.), assessed in a nursery trial. Study involved 5 families of half-sib progenies which originate from the Northern part of Serbia (Vojvodina Province). The results showed significant differences among families in regards of stomatal conductance (0.163–0.256 mol m–2 s–1), transpiration (3.27–5.28 mmol m–2 s–1) and water use efficiency (1.98–3.80 μmol mmol−1) (p≤0.001), while differences regarding net photosynthesis (10.49–12.44 μmol m–2 s–1) were not statistically significant (p≤0.124). Canonical discriminant analysis (CDA) was performed in order to estimate multivariate relations among analyzed leaf photosyntetical traits. Families were separated by the first canonical axis (CD1), which described 82% of variability. Presence of differences in regards of E, gs and WUE indicate the possibility of choosing the best families for a breeding program.
Key words: Wild cherry, leaf photosynthetic traits, half-sib progenies
INTRODUCTION
Uvod
Wild cherry (Prunus avium L.) is the most important European tree species in the family Rosaceae (Russell 2003). It is a fast growing tree, occurring generally as isolated trees, clumps, rows at edges of forest, and only rarely in denser mixed stands (Santi et al. 1998). Wild cherry is highly interesting for both ecological and economic reasons. Due to its valuable wood, the species is now increasingly planted in Europe, both in afforestation of abandoned farm land and enrichment of forests. Also, the species is important in terms of increasing biodiversity and sustainability of forest ecosystems (Stojecová & Kupka 2009).
Wild cherry breeding programs have a long tradition in Europe. According to Kobliha (2002) the greatest wild cherry programs are realized in France and Germany. Except of these countries, breeding programs are also successfully implemented in Italy, Belgium, Netherlands, Slovakia, Spain, Czech Republic, etc. Wild cherry breeding program in Serbia has been established in 2005, when inventarisation of