Acta Univ. Agric. Silvic. Mendelianae Brun. 2007, 55(2), 99-104 | DOI: 10.11118/actaun200755020099

Potenciál tvrdosti zrna ječmene (Hordeum vulgare L.) jako selekčního znaku v procesu šlechtění

Karel Vejražka1, Vratislav Psota2, Jaroslava Ehrenbergerová1, Natálie Březinová Belcredi1, Radim Cerkal1
1 Ústav pěstování, šlechtění rostlin a rostlinolékařství, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
2 Sladařský ústav Brno, Výzkumný ústav pivovarský a sladařský, a. s., Mostecká 7, 614 00 Brno, Česká republika

Přesné stanovení kvality ječmene mikrosladováním je pro šlechtitelskou selekci nákladné, a proto jsou hledány vhodné levné metody odhadu kvality. Cílem bylo zjistit, zdali je možné podle úrovně tvrdosti obilek ječmene selektovat na sladovnickou kvalitu. Byly analyzovány vzorky obilek souboru deseti odrůd ječmene. Tvrdost obilek byla stanovena metodami PSI (Particle size index), tvrdostí dle Brabendera (BRA) a metodou stanovení energie potřebné k mletí vzorku (GME). Vzorky byly následně mikrosladovány a u sladů byly stanoveny vybrané technologické parametry.
Byly zjištěny statisticky průkazné rozdíly mezi odrůdami v úrovni tvrdosti. Byly stanoveny korelace mezi úrovní tvrdosti a vybranými technologickými parametry ječmene a sladu. Hodnoty PSI byly v průkazné korelaci s dosažitelným stupněm prokvašení (0.73*) a glycidovým extraktem (0.70*). Hodnoty BRA byly v průkazné korelaci s dosažitelným stupněm prokvašení (-0.80*) a obsahem rozpustného dusíku ve sladu (0.64*). Hodnoty GME byly ve významné korelaci s obsahem dusíkatých látek ve sladu (0.64*). Po ověření na rozsáhlejším souboru vzorků může být tvrdost zrna použita jako selekční znak v časných fázích selekce.

tvrdost, energie potřebná k mletí, kvalita, ječmen, particle size index, Do-Corder

Potential of grain hardness of barley (Hordeum vulgare L.) as a selection trait in breeding programme

The study presents the results of research on the use of barley caryopses hardness for prediction of the malting quality. Grain hardness was determined by three methods: Particle size index (PSI), hardness according to Brabender (BRA) and grain milling energy (GME). The correlations among methods for determining the kernel hardness were estimated as well among selected technological traits of barley and malt and kernel hardness. Significant correlations were found among PSI values and Final attenuation of laboratory wort from malt (0.73*) a Glycidic extract (0.70*). Values of kernel hardness measured by BRA significantly correlated with Final attenuation of laboratory wort from malt (-0.80*) and Soluble nitrogen of malt (0.64*). Grain milling energy values were statistically significant correlated with Nitrogen content in malt (0.64*). The preliminary results confirmed the possibility to use kernel hardness for prediction of some malting quality traits. Further studies will be done on larger number of samples.

Keywords: hardness, milling energy, quality, particle size index, Do-Corder, barley
Grants and funding:

This research was supported by two grants from Czech Ministry of Education, Youth and Sports under projects MSM6019369701 and 1M0570.

Received: February 9, 2007; Published: November 27, 2014  Show citation

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Vejražka, K., Psota, V., Ehrenbergerová, J., Březinová Belcredi, N., & Cerkal, R. (2007). Potential of grain hardness of barley (Hordeum vulgare L.) as a selection trait in breeding programme. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 55(2), 99-104. doi: 10.11118/actaun200755020099
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