SOURCES OF BIOCHEMISTRY OF BLACK CURRANT BERRIES FOR USE IN BREEDING IN THE BASHKIR URALS
The article presents the results of research on the biochemical composition of black currant berries ( Ribes nigrum L.) cultivated in the Republic of Bashkortostan. The objects of research were the varieties of selection of the Bashkir research Institute: Valovaya (control), Karaidel, Chishma, Kushnarenkovskaya, Belskaya and Estafeta. Observations were made over 13 years (2006-2019). Differences in the accumulation of components of the biochemical composition depending on the varietal characteristics of the crop are shown. Varieties that can be used in breeding as sources of individual economically valuable traits are identified. Varieties of black currant ( Ribes nigrum L.) of Bashkir selection, cultivated in the Republic of Bashkortostan, contain on average: 18.7±0.6% of soluble solids, 8.9±0.4% of sugars, 2.1±0.2% of titrated acids and 162.1±6.5 mg/100g of ascorbic acid. Varieties that can be used in breeding as sources of individual economically valuable traits are identified: increased dry matter content: gross-18.9±1.0%, Karaidel-19.3±1.4% and Chishma-19.8±0.7%; increased sugar accumulation: Karaidel-9.2±0.8% and relay-9.6±0.6%; low content of titrated acid: gross-1.9±0.3%, Kushnarenkovskaya-2.0±0.2%, Chishma-2.0±0.2%; high content of ascorbic acid: Belskaya-162.7±6.5 mg / 100g and Chishma-191.7±15.5 mg / 100g; stability of accumulation of components of the biochemical composition - Kushnarenkovskaya and Belskaya. Varieties of black currant breeding Bashkirsriy Velikan, Chishma, Karaidel, Kushnarenkovskaya, Belskay, Estafeta meet modern market requirements.