Phenotypic variability of oleic and linoleic fatty acid contents in some sunflower genotypes

Abstract

The fatty acids ratio, particularly the ratio between oleic and linoleic acids, is of a prime importance for the sunflower oil quality. Variability of the fatty acid content was been studied in several sunflower genotypes (5 CMS lines, 3 restorers and their 15 F1 hybrids). The standard deviation and the coefficient of variation were used as indicators of variability. To establish the effects of genotype, environment and their interactions on the examined properties, the analysis of variance for two-factorial trial including year as one of the factors, was applied. The studied genotypes varied significantly in the contents of oleic and linoleic acids (19.70-26.52% and 61.46-67.89%, respectively). The analysis of components of phenotypic variance showed that genotype determined the expression of both properties in the inbred lines. In the F1 hybrids, however, the expression of the oleic acid content was determined by a year, and the expression of linoleic acid by a genotype.

Za kvalitet ulja suncokreta izuzetno je važan odnos viših masnih kiselina naročito oleinske i linolne. Iz tih razloga je ispitivana varijabilnost različitih genotipova suncokreta (5 CMS linija, 3 restorer linije i njihovih 15 F1 hibrida) za ova svojstva. Kao pokazatelji varijabilnosti korišćene su standardna devijacija i koeficijent varijacije. Da bi se utvrdio uticaj genotipa, faktora spoljne sredine i njihove interakcije na ispitivana svojstva primenjen je model analize varijanse za dvofaktorijalni ogled, gde je jedan od faktora godina, Borojević, 1992. Ispitivani genotipovi su se značajno razlikovali po sadržaju koko oleinske (19,70-26,52%), tako i linolne kiseline (61,46-67,89%). Analiza komponenti fenotipske varijanse pokazuje da je udeo genotipa u ekspresiji oba ispitivana svojstva najveći kod inbred linija, dok je kod F1 hibrida najveći uticaj godine za sadržaj oleinske kiseline, a genotipa za sadržaj linolne kiseline.