Leaf Number and Thermal Requirements for Leaf Development in Winter Barley

摘要: Development and growth of cereal leaves significantly affect grain yield since dry matter accumulation depends on the leaf area that intercepts light. Phyllochron is defined as time interval between appearance successive main stem. The aim this study was to determine effect year cultivars final number (FLN) phyllochron (PHY) in winter barley. Thermal unit used timescale with 0 °C base temperature. Twelve differing origin anthesis (early, medium, late) were tested during six growing seasons (GS), 2002/2003–2007/2008. FLN across GSs 13.5, PHY 75.7 GDD leaf−1. highest late, six-rowed barley cultivar Kredit (14.7). lowest early, two-rowed Novosadski 581 (11.3). In regard earliness, early (12.9) late ones (13.9). Cordoba, 81.6 leaf−1, 581, 71.0 had fast development, medium slow 72.5 75.6 78.9 respectively. showed significant variability PHY, which can be for selecting most adaptable genotypes specific conditions.