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The aims of the present study were to estimate the general combining ability (GCA) and the specific combining ability (SCA) effects controlling type II FHB resistance across environments in a set of European winter wheat varieties and, for purposes of future selection, to identify potential combinations of parents with suitable levels of FHB resistance. Parental varieties as well as F1 generations were evaluated under both field and greenhouse conditions in two years. The results of the present study indicate that in the F1 generation mean DON content was relatively lowest after crossing of moderately resistant parents (Sakura/Bakfis, Sakura/Federer, Petrus/Bakfis, and Sakura/Petrus), and mean DON content is low also after crossing the moderately resistant Bakfis variety with the susceptible Biscay and Cubus varieties. Evaluation of crosses in the F1 generation was followed by evaluation of selected crosses (derived from the Bakfis and Sakura varieties) in the F2 generation. Correlations between F1 and F2 were highly significant in relation both to their DON content and visual symptom score (VSS), as well as between the individual experiments (and in the different years). The only exception was in the case of the 2014 field experiment, when inoculation was successful but conditions were not optimal for the disease to progress and DON to accumulate. The selection of a suitable parental variety (with a high GCA) can markedly influence the success rate of breeding for resistance to FHB. Detection of high SCA in the F1 generation is important for directing breeders to promising combinations for achieving FHB resistance. It was demonstrated here that low DON content may be achieved even after crossing a moderately resistant variety with susceptible varieties. Another possibility is to make use of heterosis directly for acquiring resistance in hybrid wheat (for decreasing DON content and manifestation of symptoms).

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4 129 133 Pepó, Péter, Győri, Z. (2005): A Study of the Yield Stability of Winter Wheat Varieties — Cereal Research Communications, Vol. 33 No. 4

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., Shao, M. A., Dyckmans, J. 2000: Nitrogen nutrition and water stress effects on leaf photosynthetyc gas exchange and water use efficiency in winter wheat. Environmental and Experimental Botany 44: 141–149. p

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41 220 225 Bateman, G.L. 1993. Development of disease symptoms and fungal pathogens on shoot bases in continuous winter wheat, and effect of

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Z. Z. Xu, Z. W. Yu, D. Wang, and Y. L. Zhang Nitrogen Accumulation and Translocation for Winter Wheat under Different Irrigation Regimes. Journal of Agronomy and Crop Science. Volume 191Issue 6, Page 439

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4 Pepó Péter — Győri Z. 2005. A study of the yield stability of winter wheat varieties. Cereal Research Communications, 33.4. 769. Győri Z

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. Lehoczky É. Kismányoky A.: 2005. Biomass production of weeds on the winter wheat stubble in long-term fertilization field experiment. Cereal Research Communications vol. 33 no. 1 251–254 pp. Kismányoky A

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Marton L. (2002): Relationships between rainfall, nutrient supplies and the yield of winter wheat ( Triticum aestivum L.). Novenytermeles vol. 51 no. 5 529–542 pp. Marton L

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. Orta H. Effect of different water stresses on the yield and yield components of winter wheat CEREAL RES COMMUN 2004 32

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.N., Ittu, G. 2001. Fusarium head blight resistance in doubled-haploid lines derived from crosses with a resistant winter wheat parent. In: Bedő, Z.,. Láng, L. (eds), Wheat in a global environment: Proceedings of the 6th International Wheat Conference, June

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