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Rapid Quality Assessment of Wheat Cultivars Registered in Poland Using the 2-g Mixograph and Multivariate Statistical Analysis

¹The University of Reading, School of Food Biosciences, Reading RG6 6AP, UK. ²Corresponding author. E-mail: b.dobraszczyk@reading.ac.uk ³Institute of Plant Genetics, Polish Academy of Sciences, 60-479 Poznań, Poland. ⁴DANKO Plant Breeding, Choryń, Poland.

Baking and 2-g mixograph analyses were performed for 55 cultivars (19 spring and 36 winter wheat) from various quality classes from the 2002 harvest in Poland. An instrumented 2-g direct-drive mixograph was used to study the mixing characteristics of the wheat cultivars. A number of parameters were extracted automatically from each mixograph trace and correlated with baking volume and flour quality parameters (protein content and high molecular weight glutenin subunit [HMW-GS] composition by SDS-PAGE) using multiple linear regression statistical analysis. Principal component analysis of the mixograph data discriminated between four flour quality classes, and predictions of baking volume were obtained using several selected mixograph parameters, chosen using a best subsets regression routine, giving R² values of 0.862–0.866. In particular, three new spring wheat strains (CHD 502a-c) recently registered in Poland were highly discriminated and predicted to give high baking volume on the basis of two mixograph parameters: peak bandwidth and 10-min bandwidth.