CHARACTERISTICS OF PHENOTYPICAL VARIABILITY OF BAYANSHIRA GRAPE VARIETY

The article provides detailed information about ampelodescriptor signs, morphological, biological and technological features of the valuable indigenous grape variety Bayanshira, originating from the ancient center of viticulture – Ganja-Dashkasan zone of Azerbaijan. The enocarpological and enochemical characteristics of bunches and berries, the population structure and the variability of this variety were studied. In order to determine the direction of use and technological suitability of the Bayanshira variety yield, an uvological assessment of bunches and berries of fresh grapes was carried out, prototypes of wines of various types were prepared and their physicochemical analysis was carried out using modern methods. As a result of assessing the intrapopulation phenotypic variability of the variety, several biotypes and clonal variations were identified, their distinctive characteristics were identified and described, and morphological features, biological and technological indicators were studied. Based on the above, a number of important indicators of the biotype of the Bayanshira variety can be noted: t he size of the bunch ranged from 17,2 × 7,7 to 26,5 × 12,6 cm, the shape of the bunches was conical, the number of berries in the bunch was generally more than 200 pieces, but only biotype 6 had an average number of berries in a bunch (150 pieces), berry size ranged from 19,4 × 19,0 to 23,4 × 22,2 mm, bush yield was 4,4-12,4 kg, yield juice from berries was 48,4-84,6 %, sugar content of berry juice was 17,4-21,4 g/100 cm3 , titratable acidity was 4,65-8.02 g/dm3 , the amount of phenolic compounds was 0,25-0,45 g/dm3 , and the amount of biologically active substances was 0,12-0,36 g/dm3.