Tolerance of cotton to certain biotic factors and fiber quality parameters of the ridges created by simple and complex hybridization

¹ Tashkent State Agrarian University, Tashkent, 100140, Uzbekistan
² Scientific Research Institute of Cotton Breeding, Seeding and Cultivation Agrotechnologies, Tashkent, 100140, Uzbekistan
³ Andijan Agricultural and Agrotechnological Institute, Andijan, 170101, Uzbekistan

^* Corresponding author: ftoreev@mail.ru

Abstract

Among the strains derived from simple hybrids studied in the experiments, T-3 T-9, T-18 and strains T-43, T-53, T-57 and 60 from strains derived from complex hybrids were resistant to gommosis and wilt diseases. As a result of several years of research, it was found that the ridges obtained from complex hybrids were less affected by gommosis and wilt diseases than the ridges obtained as a result of simple hybridization. It was found that wilt disease was 3-4 times more resistant in the ridges created as a result of simple and complex hybridization compared to the model seed. Lines T-155, T-158, T-163, T-167, T-188 and T-208 from simple hybrids of cotton and lines T-212, T-215, T-220 and T-222 from complex hybrids are other It was determined that the quality of the fiber meets the requirements of the world standards in relation to the ridges and pattern type. In the studied samples, the families of ridges that do not have positive quality indicators such as fiber micronaire, yarn elasticity coefficient, fiber length, relative tensile strength and fiber uniformity are discarded, and experiments are carried out in the following years in order to incorporate new ridges that meet the requirements of the world standard with other economically valuable characteristics detached to continue.