Seed yield of red fescue (Festuca rubra L.) and correlation dependence with yield components and seed quality

Abstract

The paper presents the results of two years of research conducted in eastern Serbia (2007-2008). Tests were conducted with domestic varieties K-14, which was developed at the Institute for Forage Crops, Krusevac. At two different densities B1 (the inter-row distance of 12.5 cm and 15 kg ha-1 seed) and B2 (25 cm row spacing and 7.5 kg ha-1 seed) following components of yield were observed: plant height (cm), number of generative stems, inflorescence length (cm), number of branches in umbel; seed yield (kg ha-1) The following parameters of seed quality were: 1000 seed weight (g), germination energy (%), germination of seeds (%). Interdependence of the traits was determined by simple correlation coefficients (r). The highest seed yield was recorded in density B2. Variability of seed yield was high (CV = 49.9%), because influence of year and plant density. Seed yield achieved the strongest positive correlation (p ≤ 0.01), with generative stems (r=0.994). Also strong dependence was found between plant height and number of generative stems (r=0.977).

Rad prikazuje rezultate dvogodišnjih ispitivanja sprovedenih u istočnoj Srbiji (2007­ 2008). Ispitivanja su izvedena sa domaćom sortom K-14, koja je stvorena u Institutu za krmno bilje, Kruševac. Na dve različite gustine: B1 (setva na međuredno rastojanje 12,5 cm i sa 15 kg ha-1 semena) i B2 (25 cm međuredno rastojanje i 7,5 kg ha-1 semena) praćene su sledeće komponente prinosa: visina stabljike (cm), broj generativnih stabljika, dužina cvasti (cm), broj grana u cvasti, prinos semena (kg ha-1). Praćeni su sledeći parametri kvaliteta semena: masa 1000 semena (g), energija klijanja (%), ukupna klijavost semena (%). Međuzavisnost ispitivanih osobina utvrđena je prostim koeficijentima korelacije (r). Veći prinos semena ostvaren je sa gustinom B2. Varijabilnost prinosa pod uticajem godine i gustine, bila je visoka (CV =49,9%). Prinos semena ostvario je najjaču pozitivu korelativnu međuzavisnost (p≤0,05) sa generativnim stabljikama (r=0,994). Takođe jaka zavisnost utvrđena je između visine stabljika i broja generativnih stabljika (r=0,977).