Biochemical composition of blackberry varieties cultivated under the climatic conditions of the Samarkand region

This study examined blackberry fruits' biochemical composition and quality at full ripeness. The content of carbohydrates, vitamins, flavonoids and amino acids was analyzed in dried fruits from the following blackberry varieties: Jumbo, Thornfree, Karaka Black, Brazos, Brzezina, Cacanska Bestrna and Chester. The results indicated that the fruits contained relatively high concentrations of the amino acids asparagine, cysteine, alanine and proline. Among the varieties, Chester exhibited the highest amino acid content (22.55 mg/g), closely followed by Thornfree (22.30 mg/g). Carbohydrate content was observed to be the highest in the Cacanska Bestrna variety (9.01 mg/g) and the lowest in the Karaka Black variety (3.37 mg/g). Vitamins (B2, B6, B9, B12, PP and C) and flavonoids (Hypolyethylen, Hypolyethylen 7-O-D-Gly, Rutin, Isorhamnetin and Hyperoside) were also quantified. The analysis revealed that flavonoid content was exceptionally high in the Karaka Black variety (84.116 mg/100 g) and relatively low in the Brzezina variety (35.389 mg/100 g). Regarding vitamin C content, Karaka Black recorded the highest levels (211.321 mg/100 g), whereas Jumbo exhibited the lowest levels (135.265 mg/100 g). These findings could be a valuable resource for the food processing industry and agricultural practices. They provide a basis for establishing quality standards for different blackcurrant varieties and identifying the optimal harvest period for each.