Variability of tocopherols, tocotrienols and avenanthramides contents in European oat germplasm
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A broad spectrum of European oat genetic resources representing crop wild relatives, landraces, traditional, obsolete and modern cultivars, was observed in a multi-location field study all over Europe. Here analyses results of 173 accessions for tocopherols and tocotrienols, and of 137 accessions for avenanthramides from groat samples are reported. Genotype, environment and interaction effects, as observed on a set of standard cultivars, were highly significant for most of the targeted traits. Environment effects were often dominant. Higher contents of these compounds than previously reported in oat have been frequently found. High values of α-tocotrienol and avenanthramides were detected in grains of Avena strigosa. Also few cultivars of A. s ativa reached more than 100 mg kg−1 α-tocotrienol. Contents of ß, γ- and δ-tocols were low; the latter often close to the detection limits. Presence of avenanthramides in Avena species other than A. s ativa is shown for the first time.
KeywordsAvena ssp. Avenanthramides Environmental effects Genetic resources Tocols
The authors wish to thank the partners involved in the multiplication, de-hulling and milling of the selected accessions and in the determination of the seed weight: Külli Annamaa, Jõgeva Plant Breeding Institute, Estonia; Izabela Kordulasinska and Zofia Bulinska, IHAR, Radzików, Poland; Nadezhda Antonova, Institute of Plant Genetic Resources “K. Malkov”, Sadovo, Bulgaria; Alf Ceplitis, Svalöf Weibull AB, Svalöv, Sweden; Jean Koenig and Gérard Branlard, INRA, Clermont-Ferrand, France; Danela Murariu, Vegetal Genetic Resources Bank of Suceava, Romania; Matthias H. Herrmann, Julius Kühn Institute, Groβ Lüsewitz, Germany. Janicka Nilsson is acknowledged for performing the avenanthramide analyses. Further they thank the two referees, who carefully went through the text and made valuable suggestions for clarification and improvement. This research was part of the European Project “Avena genetic resources for quality in human consumption”, co-funded by the European Commission (AGRI GENRES 061, council regulation 870/2004) with additional contributions by Peter Koelln KGaA, Elmshorn, Germany, Emco spol. s r. o., Prague, Czech Republic and Gemeinschaft zur Förderung der privaten deutschen Pflanzenzüchtung e.V., Bonn, Germany.
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