Assessment of Resistance of Barley Varieties to Diseases in Polish Organic Field Trials

Tomasz Lenartowicz (), Henryk Bujak, Marcin Przystalski, Inna Mashevska, Kamila Nowosad, Krzysztof Jończyk and Beata Feledyn-Szewczyk
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Tomasz Lenartowicz: Research Centre for Cultivar Testing, Słupia Wielka 34, 63-022 Słupia Wielka, Poland
Henryk Bujak: Research Centre for Cultivar Testing, Słupia Wielka 34, 63-022 Słupia Wielka, Poland
Marcin Przystalski: Research Centre for Cultivar Testing, Słupia Wielka 34, 63-022 Słupia Wielka, Poland
Inna Mashevska: Department of Genetics, Plant Breeding and Seed Production, Wrocław University of Environmental and Life Sciences, Grunwaldzki 24A, 50-363 Wrocław, Poland
Kamila Nowosad: Department of Genetics, Plant Breeding and Seed Production, Wrocław University of Environmental and Life Sciences, Grunwaldzki 24A, 50-363 Wrocław, Poland
Krzysztof Jończyk: Department of Systems and Economics of Crop Production, Institute of Soil Science and Plant Cultivation—State Research Institute in Puławy, 24-100 Puławy, Poland
Beata Feledyn-Szewczyk: Department of Systems and Economics of Crop Production, Institute of Soil Science and Plant Cultivation—State Research Institute in Puławy, 24-100 Puławy, Poland

Agriculture, 2024, vol. 14, issue 5, 1-11

Abstract: Leaf rust and net blotch are two important fungal diseases of barley. Leaf rust is the most important rust disease of barley, whereas net blotch can result in significant yield losses and cause the deterioration of crop quality. The best and the most environmentally friendly method to control diseases is to cultivate resistant varieties. The aim of the current study was to identify barley varieties with an improved resistance to leaf rust and net blotch in Polish organic post-registration trials conducted in the years 2020–2022. For this purpose, the cumulative link mixed model with several variance components was applied to model resistance to leaf rust and net blotch. It was found that the reference variety Radek was the most resistant to leaf rust, whereas variety Avatar outperformed the reference variety in terms of resistance to net blotch, although the difference between the two varieties was non-significant. In the present study, the use of the cumulative link mixed model framework made it possible to calculate cumulative probabilities or the probability of a given score for each variety and disease, which might be useful for plant breeders and crop experts. Both, the method of analysis and resistant varieties may be used in the breeding process to derive new resistant varieties suitable for the organic farming system.

Keywords: leaf rust; net blotch; barley organic trials; ordinal data; cumulative link mixed model (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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