Creation of selected items with high fiber yield and length based on cotton composite hybrids

¹ Tashkent State Agrarian University, 100140 Tashkent, Uzbekistan
² Institute of cotton breeding, seed breeding and agrotechnologies, 100140 Tashkent, Uzbekistan

^* Corresponding author: g.kholmurodova@yandex.ru

Abstract

The wide range of possibilities of using double, complex and double crossing methods in cotton has been studied in selection research. As a result of the use of complex hybridization, valuable traits of varieties of different genetic origin can be collected in a single genotype in a short period of time. Because in the hybrids created on the basis of complex cross-breeding, the variability of quantitative characters is manifested on a large scale, and the possibility of extensive selection appears in these hybrid populations. It is important to use various breeding methods in cotton selection, which are widely used in other agricultural crops. As a result of transgressive variation occurring in composite hybridization in cotton, the increase in the possibility of isolating recombinants, which are the source of new genetic variations, which gives the opportunity to create new varieties with a positive set of valuable economic characters in a short time, has been confirmed in the selection of other crops. In the article, it is stated that the correct selection of parental pairs and the use of composite hybridization method are important for the improvement of fiber yield and fiber length in the creation of new varieties of cotton. In particular, the effectiveness of using T-3377, T-3378, T-3379 varieties, created on the basis of composite hybridization, in achieving positive results in terms of fiber yield and fiber length was highlighted.