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Variation in the Ratio of Oat (Avena) Protein Fractions of Interest in Coeliac Grain Diets

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Abstract

The previously found wide range in the ratios of avenin or methanol-precipitated fractions to residual proteins was revisited by studying 75 oat varieties, mainly representing landraces from Finland, and included old varieties or selections, cv. Kytö, synthetic hexaploid oats and an Avena strigosa line (HA 71–87). The means of the fraction ratios ranged from 4.17 to 6.46 with significant differences. Samples of 10 narrow-ratio and 10 wide-ratio oats were compared more closely. The wide-ratio sample had significantly higher total protein content and significantly lower content of the methanol-precipitated protein fraction. Therefore, both fractions in general appear to contribute to the ratio of the protein fractions. The wide-ratio sample had significantly lower grain mass and husk-free karyopsis mass. Samples of the extreme ends in the ratios of the protein fractions showed different electrophoretic protein patterns, which was also seen in samples representing the same population of origin. It is evident that polymorphisms in the protein fractions would allow breeding of oat cultivars showing further lowering of proteins putatively toxic to coeliacs assuming oats contain these toxic proteins.

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Authors and Affiliations

  1. MTT-Agrifood Research Finland, Plant Breeding Biotechnology, Myllytie 10, FIN-31600, Jokioinen, Finland

    Hannu Ahokas, Eila Heikkilä & Marja-Leena Alho

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  1. Hannu Ahokas
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  2. Eila Heikkilä
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  3. Marja-Leena Alho
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Correspondence to Hannu Ahokas.

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Ahokas, H., Heikkilä, E. & Alho, ML. Variation in the Ratio of Oat (Avena) Protein Fractions of Interest in Coeliac Grain Diets. Genet Resour Crop Evol 52, 813–819 (2005). https://doi.org/10.1007/s10722-003-6024-6

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  • DOI: https://doi.org/10.1007/s10722-003-6024-6

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