Influence of genotype and nitrogen nutrition on grain size variability in spring malting barley

Abstract

Kosovo and Metohija, Serbia Stupar V., A. Paunović, M. Madić, D. Knežević (2017): Influence of genotype and nitrogen nutrition on grain size variability in spring malting barley.-Genetika, Vol 49, No.3, 1095-1104.Grain size is an important quality parameter of malting barley, which depends on genotypes, environmental factors and their interactions. Also, grain size is governed by the efficiency of assimilation and translocation of mineral nutrients (mainly nitrogen) during grain endosperm development, which affects grain yield. The aim of this study was to evaluate variability in the percentage of three different grain size classes: class I (thickness 2.5 mm), class II (2.2-2.5 mm) and class III (<2.2 mm) in spring malting barley genotypes ('Novosadski 448', 'Novosadski 456', 'Dunavac' and 'Jadran'). The experiment was conducted during three years (2012-2014) in a randomized complete block design with three replications at different rates of nitrogen fertilization (N1=45, N2=75, N3=105 and N4=135 kg ha -1 ). The presence of different grain sizes in barley cultivars in all N fertilization treatments after harvest was 1096 GENETIKA, Vol. 49, No3, 1095-1104, 2017 investigated. The proportion of the three grain classes was dependent upon year, cultivar and nitrogen fertilization rate. The highest percentage of class I grains was recorded in 'Novosadski 456', and that of class II and class III grains in 'Dunavac'. The percentage of class I grains increased significantly with increasing nitrogen rates up to 75 kg ha -1 , stagnated at 105 kg ha -1 , and decreased significantly as the nitrogen level was further increased to 135 kg ha -1 . Class II and class III grain contents decreased at nitrogen rates up to 105 kg ha -1 , but increased significantly at 135 kg ha -1 . The best response to favorable environmental conditions and the highest percentage of class I grain in all years were recorded in 'Novosadski 456'. The most favorable effect on grain size in the studied spring malting barley genotypes was exhibited by the nitrogen rate of 75 kg ha -1 .

Genotypic Variation of Nitrogen Use Efficiency and Amino Acid Metabolism in Barley

“…Fortunately, barley shows great potential for biomass production under Mediterranean climates. As is the case for most cereals, barley yields are strongly dependent on nitrogen fertilization (Oscarsson et al, 1998;Sedlář et al, 2011;Stupar et al, 2017). Importantly, nitrogen fertilization impacts plant tolerance to abiotic and biotic stresses (Fagard et al, 2014;Abid et al, 2016;Mur et al, 2017;Ding et al, 2018;Verly et al, 2020).…”

Effect of cereals + pea intercropping on spike index of spring wheat, triticale, oat and pods index of pea

“…In production practice of cereal and other annual crops are sown as monocultures with applied crop rotation to protect soil properties (fertility of soil, nutrients) and suppressing weeds, reduce pest and pathogens (Smith et al, 2011). The achievement of high yield in conventional cultivation determined with genetic control of numerous traits of seed (Kneţević et al, 2019a), stem (Branković et al, 2015) nitrogen nutrition (Kneţević et al, 2016;Stupar et al, 2017) soil quality and regime of fertilization (Madić et al, 2019) agro ecological conditions (Kondić et al, 2012). The monocrop of pea and cereals characterize good productivity.…”