Breeding Progress in Grain Yield and Selected Agronomic Characters of Winter Barley (Hordeum vulgare L.) over the Last Quarter of a Century

摘要: This study gives estimates of breeding progress achieved in winter barley (Hordeum vulgare L.) since the 1960′s grain yield and change several morphological traits for seventeen historically important cultivars: 12 six-rowed 5 two-rowed, grouped into four epochs according to period major commercialization Italy. All genotypes were evaluated across a range soil fertility climatic environments. The modern cultivars have shown consistent increase tillers/m2 seeds/spike (16 28 %, respectively) over local populations. In two-rowed cultivar ‘Igri’ seed weight were, respectively, 20 14 % snd decreased by The less lodging, are earlier shorter than old varieties last quarter century, gram has been increased 52 74 kg/ ha/year or 0.75 1.1 per year genotypes: while gain biomass same was not uniform cuitivars 64 kg/ha/ 0.46 cultivars. improvement is result better partitioning photosynthetic products grain.