Abstract
Thousand kernel weight (TKW) is a yield component associated with grain quality. It is reported in the literature that TKW is significantly influenced by varieties, agro-ecological conditions and disease indices, but the influence of their interactions on TKW loss has rarely been taken into consideration. The main objective of this study was to examine the combined effects of multiple diseases and climatic conditions on TKW losses in winter wheat. Leaf rust, powdery mildew, and Septoria tritici blotch were considered biotic predictor variables in regression models explaining TKW losses. Monthly averages of temperature, relative humidity and total rainfall in May and June in the 2006–2013 growing seasons were used as abiotic predictor variables. The results of this study indicated a significant low positive correlation between yield loss and TKW loss in the two varieties. TKW losses were less influenced by leaf rust, powdery mildew, and Septoria tritici blotch than yield losses. The significant influence of the interaction between variety and the environmental conditions on TKW loss was confirmed from the general linear model function. The results of this study indicated that factors influencing yield and yield component losses are part of the complex environment, and the relationship between them should be investigated with respect to their interactions.
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Acknowledgements
This study was realized as part of the project TR 31066 - Contemporary breeding of small grains for current and future needs financed by the Ministry of Education and Science of the Republic of Serbia.
Funding
This study was realized as part of the project TR 31066 - Contemporary breeding of small grains for current and future needs financed by the Ministry of Education, Science and Technological Development of Republic of Serbia.
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Jevtić, R., Župunski, V., Lalošević, M. et al. The combined effects of multiple diseases and climatic conditions on thousand kernel weight losses in winter wheat. Eur J Plant Pathol 152, 469–477 (2018). https://doi.org/10.1007/s10658-018-1494-8
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DOI: https://doi.org/10.1007/s10658-018-1494-8