PROTEIN PROFILE OF SOME GENOTYPES OF FLAX Linum usitatissimum L. IN THE STRUMICA REGION, REPUBLIC OF MACEDONIA

Abstract

Flax (Linum usitatissimum L.) is an industrial crop and has great importance for humans and economy.

Analysis of five different flax genotypes, produced in the Strumica region, Republic of Macedonia, in 2014 and 2015 is made, with regard to the content of protein in the flaxseed. The experiment consisted of five variants in three repetitions, divided by the method of randomized block system. During the vegetation, standard farming practices for field flax production were used. Analysis of the protein content in flaxseed was made in the Laboratory for plant and environmental protection, at the Faculty of Agriculture, “Goce Delcev” University – Stip (Standard: ISO 20483:2006). The content of protein in flaxseed was analyzed by Kjeldahl method. The results were statistically processed by the method of analysis of variance, and the differences were tested by LSD – test.

The content of protein in flaxseed of the tested genotypes ranged from 26.9% to 29.4%. All flax genotypes had higher percentage of proteins in the seed. But, the genotypes Belinka (29.3%) and Velušina (28.5%) are characterized by the highest average content of protein in the seed, regardless the year of production. Belinka and Velušina are perspective genotypes for the food industry, as they have higher content of protein in the seed than the other analyzed genotypes.