STUDY OF DROUGHT RESISTANCE OF RED CURRANT SELECTED SEEDLINGS ACCORDING TO THE WATER REGIME INDICATORS
The work was carried out on the basis of the laboratory physiology of fruit plants resistance of the Russian Research Institute for Fruit Crop Breeding (VNIISPK) in 2019-2020. The objects of study were selected seedlings of red currant selection of the Institute. The method of artificial leaves dehydration was used for determination the drought resistance. The purpose of study was study indicators of water regime of selected seedlings of red currant in connection with their drought resistance. The water content, water deficiency, and the ability to restore water content after stress were determined. The Jonkheer Van Tets variety was use, as a control variety. In the result of study the indicators water regime of leaves in field conditions, the average level of water content was determined in the most hybrid forms of red currant. The lower level of leave water content was shown in July in compare to June, because there was an intensive outflow of water to the berries during the period of mass fruiting. In the field conditions, with sufficient plant moisture, red currant hybrids had a low water deficiency of leaves. After drought modelling, the water deficiency was increased in all the samples. The minimum amount of water deficiency in June and July under artificial conditions was found in red currant hybrids 2466-46-23. After modeling the drought and water saturation after that, select seedlings 2466-46-23, 2466-46-27, 2503-47-68, 2504-47-131, 2506-47-34, 2506-47-36, 2506-47-51, 2521-48-94 were characterized by a consistently high ability to restore the water content of the leaves. According to the results of the study some indicators of the water regime of red currant, was identified. the drought-resistant form 2466-46-23. The average level of drought resistance was shown in 2466-46-27, 2503-47-68, 2504-47-131, 2506-47-34, 2506-47-36, 2506-47-51, 2518-50-33, 2520-50-33, 2521-48-94.