Kvasny Prum. 2015; 61(9): 262-267 | DOI: 10.18832/kp2015024

Classification of barley varieties for "České pivo" using discriminant analysisPeer-reviewed article

Tibor SEDLÁČEK, Vratislav PSOTA
1 Výzkumné centrum SELTON, s. r. o., Stupice 24, 25084 Sibřina / SELTON Research Centre, Ltd., Stupice 24, 25084 Sibřina
2 Výzkumný ústav pivovarský a sladařský a. s., Lípová 15, 120 44 Praha 2 / Research Institute of Brewing and Malting, Plc., Lípová 15, 120 44 Praha 2 e-mail: sedlacek@selton.cz

Awarding of the Protected Geographical Indication "České pivo" (i.e. Czech Beer) led to the necessity of targeted breeding of barley varieties. This study investigated the effect of varieties and growing sites on the key indicators of malting quality with the aim to identify the most suitable selection criteria. Relative extract at 45 °C, β-glucan content in wort, and Kolbach Index were identified as the most suitable parameters. As these parameters are also significantly affected by the environment and residual influences, a classification function using discriminant analysis was developed. The function classified successfully 94% of samples regardless of the growing site and thus it may be used as a suitable tool for selection of barley lines that meet the qualitative requirements for the varieties recommended for production of beer with the Protected Geographical Indication "České pivo".

Keywords: malting quality, Protected Geographical Indication "České pivo", discriminant analysis

Received: May 16, 2015; Accepted: July 27, 2015; Published: September 1, 2015 

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