The impact of crop management regime on oil content and fatty acid composition in hulless and covered spring barley

إنجليزي. Lipids are a minor nutritional component of barley (Hordeum vulgare L.) grain andhave not been as widely explored as the major components. The aim of this study was toinvestigate the effect of genotype and environment, including conventional farming system withthree crop management regimes, differing in agrochemical input, and organic farming system, onoil content and fatty acid composition in grain of two covered and four hulless spring barleygenotypes during two growing seasons. Genotype significantly affected oil content and it was onaverage 4.26% and ranged in individual barley samples from 2.87 to 5.53%. We found linoleic,oleic, palmitic, α-linolenic, stearic and capric fatty acids in average proportions of 55.6; 21.3;18.6; 3.7; 0.6 and 0.4%, respectively. Higher average oil content and proportion of α-linolenicacid was found in covered barley. Crop management regime did not significantly affect oilcontent but had some effect on the proportion of linoleic, α-linolenic, oleic and stearic acid.Decrease of chemical inputs was in favour of oil content and proportion of α-linolenic, oleic andstearic acids but did not promote linoleic acid. Waxy hulless barley line with high oil content anda very high proportion of linoleic acid was identified.

إنجليزي. Received: November 11th, 2021 ; Accepted: January 30th, 2022 ; Published: March 17th, 2022 ; Correspondence: [email protected]