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Mapping of β-glucan content and β-glucanase activity loci in barley grain and malt

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Genetic study of β-glucan content and β-glucanase activity has been facilitated by recent developments in quantitative trait loci (QTL) analysis. QTL for barley and malt β-glucan content and for green and finished malt β-glucanase activity were mapped using a 123-point molecular marker linkage map from the cross of Steptoe/Morex. Three QTL for barley β-glucan, 6 QTL for malt β-glucan, 3 QTL for β-glucanase in green malt and 5 QTL for β-glucanase in finished malt were detected by interval mapping procedures. The QTL with the largest effects on barley β-glucan, malt βglucan, green malt β-glucanase and finished malt βglucanase were identified on chromosomes 2,1,4 and 7, respectively. A genome map-based approach allows for dissection of relationships among barley and malt βglucan content, green and finished malt β-glucanase activity, and other malting quality parameters.

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Communicated by G. Wenzel

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Han, F., Ullrich, S.E., Chirat, S. et al. Mapping of β-glucan content and β-glucanase activity loci in barley grain and malt. Theoret. Appl. Genetics 91, 921–927 (1995). https://doi.org/10.1007/BF00223901

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Key words

  • QTL mapping
  • β-Glucan
  • β-Glucanase Malt barley
  • Hordeum vulgare