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Variability of fat content and fatty acids profiles in seeds of a Polish white lupin (Lupinus albus L.) collection

Variability of fat content and fatty acids profiles in seeds of a Polish white lupin (Lupinus albus L.) collection

Genetic Resources and Crop Evolution 65(2): 417-431

ISSN/ISBN: 0925-9864

DOI: 10.1007/s10722-017-0542-0

The paper assess the variability of fat content and fatty acids profiles in seeds of a white lupin (Lupinus albus L.) domestic collection. The initial material comprised 371 accessions originated from 30 countries of Europe, Asia, Africa, North- and South America and Australia. According to data given by accession donors the material is divided into four classes of origin: wild lines, landraces, lines created by man and cultivars. Variability of fat content and fatty acids composition were estimated in seeds of each accession. The average fat content for analyzed collection is 9.81%. The broadest range of fat content was noticed for landraces and cultivars as compared to narrowest represented by lines created by man. Fat content ranged from 6.9% (induced mutant Wt 95497) to 14.1% (Polish cultivar Wt 95420 and the landrace Wt 95212 from Jordan). From a dietetic point of view, oil quality is more important than oil quantity in lupin seeds. On average the fatty acid (FA) in examined accessions ranked in following order of abundance: oleic acid (C-18:1) > linoleic acid (C-18:2) > linolenic acid (C-18:3) > palmitic acid (C-16:0) > eicosenoic acid (C-20:1) > stearic acid (C-18:0) ae erucic acid (C-22:1). In respect to unsaturated fatty acid (UFA), monounsaturated oleic acid in each of estimated classes of accessions was predominant and most abundant (55.7%) in broad range of minimum-maximum values from 41.2 to 66.2%. The second examined monounsaturated fatty acid was erucic acid (1.74%) found in seeds of almost all studied accessions. An exception were four accessions defined similarly to rapeseeds as "zero erucic" forms. In seeds of few accessions a content of erucic acid exceeded 3%. Among polyunsaturated fatty acids linoleic FA (omega-6) dominated followed by linolenic FA (omega-3). Both FA were in the range 13.7-33.2% and 5.6-12.8% with mean values on the level 19.6 and 10.1%, respectively. As a consequence, the examined white lupin seeds showed a very favourable omega-3/omega-6 FA ratio (0.51), ranging from 0.21 to 0.87, much higher than that of most vegetable oils. Fat content was positively correlated with stearic and oleic fatty acids and negatively with palmitic, linoleic, linolenic and erucic acid.

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Accession: 070843597

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