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Changes in fatty acid composition associated with recurrent selection for groat-oil content in oat
Authors:H Schipper  K J Frey  E G Hammond
Institution:(1) Vanderhave Research, P.O. Box 1, 4410 AA Rilland, The Netherlands;(2) Department of Agronomy, Iowa State University, 50011 Ames, IA, USA;(3) Department of Food Technology, Iowa State University, 50011 Ames, IA, USA
Abstract:Summary Groat oil of oat (Avena sativa L.) is a well-balanced oil with respect to saturated, monounsaturated, and polyunsaturated fatty acids. In this study, we measured the effect of six cycles of recurrent selection for high groat-oil content on the fatty acid composition of the groat oil. From each cycle of selection, 50 oat lines were grown in a replicated field experiment at two sites and were evaluated for groat-oil content and fatty acid composition.Concentrations of palmitate and linolenate decreased moderately over cycles of selection, whereas stearate content increased. A major increase occurred in the content of oleate and a major decrease in linoleate. Most of the modification of fatty acid composition took place within the saturated and unsaturated classes. The ratio of unsaturated to saturated fatty acids increased over cycles of selection. Significant genetic variation was present for each fatty acid, indicating that selection for different desired fatty acid compositions in groat oil of oat should be possible in this population.Abbreviations GO groat-oil content - 16:1 palmitate - 18:0 stearate - 18:1 oleate - 18:2 linoleate - 18:3 linolenate
Keywords:Avena sativa L    fatty acid composition  groat-oil content  recurrent selection
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