Impact of Combined Drought and Heat Stress and Nitrogen on Winter Wheat Productivity and End-Use Quality

Water deficit and heat stress are the main abiotic stresses affecting yield quality of winter wheat. The increasing frequency simultaneous occurrence these two might threaten global food security drives need to breed resilient high-quality cultivars. aim this study was evaluate grain yield, gluten protein characteristics in 50 wheat cultivars breeding lines during harvest years 2018 2019. components were affected more severely by combined drought 2019 than 2018. Two nitrogen (N) fertilization regimes studied, sustainable (S, 15/100/30 kg N ha?1) high-input (HI, 15/100/100 ha?1). higher HI trials compared S 2.2 t ha?1 2.4 Higher content sedimentation volume lower test weight starch observed under Genotypes containing Glu-D1 x5-y10 allele exhibited amounts unextractable polymeric proteins (%UPP = 58.5%) studied size exclusion liquid chromatography (SE-HPLC) as x2-y12 54.3%). Genotype determinant regardless application conditions. results suggest that relatively mild events Lithuania not future; however, efforts should be directed towards improved resistance ensure stable productivity region.