Creation of new high-productive tobacco varieties in the Sheki-Zakatala economic region

The article shows the implementation of selection and varietal studies on 70 samples, consisting of 35 varieties of tobacco collection nurseries and 35 hybrid selection materials, at the Zakatala Regional Experiment Station in the Sheki-Zakatala economic region. It was determined that the height of the plant in the collection area varied between 170 (Samsun-155, Samsun short) and 335 (106 blue form) cm. Thus, in the conditionally named Selected-2016 form, the height of the plants was 268 cm, and in the Virginia AZ form it was 282 cm. The maximum number of leaves was 50 in Zakatala Dubek varieties. The dimensions of the leaf blade were the highest in the Krupnolist variety with a width of 37 cm, and in the Virginia KY 160 variety with a length of 62 cm. Vegetation periods varied between 107-132 days. The height of the plant in the selection area varied between 180-295 cm. Thus, the height of the plants differed from the others with the highest being 295 cm in Virginia-20 × Zakatala Dubek and Virginia-20 × 106 blue form hybrids. The number of leaves was 49 in Virginia-20 × Zakatala Dubek form. The dimensions of the leaf blade were observed to be 64 cm in length in Virginia NC-71 × Zakatala Dubek × Virginia-20 complex pollination, and 37 cm in width in 106 blue form × Burley-122 hybrid. Vegetation periods varied between 115-129 days. In the collection area, it was observed that the highest yield indicator was 39.0 hwt/ha in Burley TN-90 varieties, and the lowest was 27.1 hwt/ha in Samsun short stature variety. Zakatala Dubek variety has the highest yield of commodity type I-II 90%, III-IV-10% and it differs from others. In the hybrid field, the highest yield index was 39.7 hwt/ha in the blue form of Virginia-20 × 106, and the lowest was 27.9 hwt/ha in the Virginia-548 × Virginia KY-160 variant. Virginia-20 × Zakatala Dubek variant had the highest yield of commodity species I-II 92%, III-IV-8% and differed from others. In 2021, 11 new hybrids were obtained as a result of selection works.