Quantitative and qualitative indicators of the fiber of the new Duru-Gavkhar-4 cotton variety (Gossypium barbadense L.)

Abstract

The currently sown fine-staple cotton varieties are characterized by low yield, late ripening, and resistance to various Fusarium races wilt and other cotton pests. Breeders are faced with the task of providing cotton-textile clusters with raw materials from high-quality cotton fiber. This requires the creation of new fine-fiber varieties of cotton, combining early maturity, high yields with increased number of fruit branches, quantity, and weight of raw cotton in one box. These important elements ensure the yield of fine- staple cotton. This article deals with the creation of the cotton variety Duru-Gavkhar-4 belonging to the genus Gossypium barbadense L. using a traditional synthetic breeding method. During many years of individual selection, a new promising fine-staple cotton variety Duru-Gavkhar-4 was created, which was obtained by crossing the Duru-Gavkhar variety with the 9647I variety. The new variety suc- cessfully passed the State Variety Test in 2020 with a result of 98 % in terms of varietal purity and uniformity. The fiber of the new cotton variety Duru-Gavkhar-4 belongs to type I. The vegetation period of the variety is 125–128 days, the yield is 33–38 сentner/ha, the fiber yield is 33–35 %, the draw weight of one box is 4.0–4.2 g, the fiber length is 39–41 mm, the weight of 1000 seeds is 118.2 g. In terms of quantitative and qualitative indicators, this variety dominates the control variety, that was Termez-31 (G. barbadense L.). The micronaire index is 3.8–4.1, which fully meets the requirements of the textile industry. The promising cotton variety Duru-Gavkhar-4 is currently being tested in the cotton-textile cluster of “KOVOTECH” in the Bagat district of the Khorezm region.

Keywords

• g. barbadense l.
• cotton
• variety
• fiber
• micronaire
• qualitative indicators