CORRELATION OF MORPHOLOGICAL, PHYSIOLOGICAL AND BIOCHEMICAL CHARACTERISTICS OF COTTON PLANTS OF THE BC4F7 GENERATION UNDER SALT STRESS CONDITIONS

This work shows the correlation of morphological and physiological traits (dry weight of a plant, stem, root, live weight of a plant, stem, root, plant height) and chlorophyll and carotenoid content of cotton in 30 families of the BC4F7 generation of genomically complex hybrids grown under laboratory conditions with artificially induced salt stress (200 mM NaCl solution). The amount of photosynthetic pigments was found to vary depending on salt stress. Chlorophyll "a", chlorophyll "b" and carotenoids were analyzed for their content under salt stress. A significant decrease in chlorophyll "a", chlorophyll "b", total chlorophyll and carotenoids was observed under salt stress conditions compared to optimal conditions. Under artificial salinization conditions, the morphological traits and the content of chlorophyll "a", "b", total chlorophyll and carotenoids of 30 families of the BC4F7 generation of genomically complex hybrids were studied against the background of five control cotton varieties and lines. Based on the results of the analysis of photosynthetic complex pigments, 17 families (O-3, O-5, O-6, O-12, O-13, O-14, O-15, O-16, O-18, O-21, O-23, O-27, O-28, O-32, O-33, O-34 and O-35) were recommended as resistant to salinization conditions.