Nutritional value of promising raspberry varieties

Abstract

Raspberry is a crop, characterized by a valuable chemical composition, which determines the wide spectrum of its utilization not only as a fresh fruit, but also as a plant raw material for the food industry. The purpose of the paper is to make an integrated assessment for the fruit of promising raspberry varieties from genetic pool of FSSI “I.V. Michurin FSC” for nutrient and biologically active substances content and mineral elements. The object of investigation was 18 raspberry fruit varieties. The varieties are promising for cultivation in the Central Black Soil region of Russia. Chemical analyses of fruit were carried out with the use of spectrophotometric, chromatographic (HPLC), atomic absorption methods. As it was found, the significant variation in chemical composition indicators turned to be dependent on varietal features. The raspberry fruit accumulated 2.9–3.9% of dietary fibre, 0.34–1.3% of protein, 13.6–31.1 mg/100g of vitamin C, 0.2–83.6 mg/100g of anthocyanins, 0.14–0.90 mg/100g of niacin, 0.1–0.9 mg/100g of resveratrol, 0.2–3.1 mg/100g of piceid, 118.8–388.0 mg/100g of potassium, 0.29–0.97 mg/100g of iron. A high level accumulation of ascorbic acid was found in Gerakl, Evrazia, Zhar-ptitsa, Peresvet varieties; anthocyanins–in Evrazia, Gerakl, Polka, Rubinovoe ozherel’e; resveratrol and piceid–in “Zhelty gigant” and “Rubinovoe ozherel’e” varieties. The studied varieties are recommended as edible fresh fruit and for the consumption in the frozen form. Preventive food production is also appropriate.

Evaluation of the Content of Micro- and Macroelements in Raspberries Depending on the Species, Cultivar Variety, and Geographical Environment

“…These contents only cover 0.5-3% of the daily requirement for Ca (Table 4). The low levels of Na in the investigated plant materials are consistent with the literature data [1,48]. On the other hand, the Ca content previously described in the literature for two cultivars of R. occidentalis 'Jewel' and 'Bristol' was 10 times higher than that determined in the analysed raspberries [50,51].…”

“…The obtained results confirm the high content of potassium (K) in raspberries, especially in all Rubus idaeus yellow fruit cultivars (1266.25-1374.74 mg/100 g) (Table 3) [48][49][50][51][52][53][54].…”

“…For comparison, in Russian varieties of yellow raspberries, 3-4 times lower concentrations of potassium were found [48]. On the other hand, among the analysed raspberries, the highest content of K was found in the red fruits of the R1616002 cultivar variety of R. idaeus (1460.19 mg/100 g) (Table 3).…”

Red Fruits Composition and Their Health Benefits—A Review

“…Strawberries and cherries appear to be the least rich in fiber, with values between 1.3 and 2.2 mg/100 g FW. According to Akimov et al [ 55 ], insoluble nutritional fiber is dominant in raspberry (68.6%). The necessary daily norm for the consumption of nutritional fiber is 20 g [ 54 ].…”

Mineral composition of repair raspberry (<i>Rubus idaeus</i> L.) fruits

“…In the prevention and treatment of age-related diseases, antioxidant strategies based on nutrition are used, including the addition of antioxidants and trace elements in the prevention (Opara, Rockway, 2006). Significant intervarietal differences in the mineral content of Na, K, Ca, Mg, Fe, Cu and Zn in raspberry fruits of different colors were established by the studies of Akimov et al (2021). The quantitative and qualitative composition of mineral substances of fruits and berries depends on the botanical species, cultivar, soil and climatic conditions, methods of cultivation, etc.…”