Indications of High-Generation Convergent Hybrids Based on Transgressive Recombination Prints in Cotton

In the article, it is presented that the use of complex and convergent hybridization is an effective method for increasing cotton weight per bag, 1000 seed weight, fiber yield and fiber length. Among the complex and convergent families based on the principle of transgressive recombination in increasing the cotton weight per bag, mainly O-401-03 and O-175-178 families, among the families based on complex hybridization in improving the weight of 1000 seeds, the O-401-03 family, convergent O-109 O-401-03, O-470-72, O-109-110, O-774-776, O-369-372 from the -110 families, as well as from the O-504-09 and O-609-610 families, improving fiber yield , O-504-09 and O-365-366 from families based on complex and convergent hybridization, relatively high values in families based on complex hybridization in terms of fiber length in families O-440-46 and O-289-90, among convergent hybrid families based on the principle of transgressive recombination The expediency of using O-609-610, O-393-94 and O-899-900 families in genetic-selection studies is highlighted

Heredity and Variability of Early Maturity of Cotton Hybrids Developed By Participation of the Introgressive Progenies

In the article described the results of the analysis of the dominancy and variability of the main components of early maturing, i.e. the “germination-50% flowering” and the “germination-50% maturing” periods of F1-F4 hybrids developed by the participation of the introgressive cotton progenies. As result of investigations there are found out mainly negative heterosis, full dominance and intermediate inheritance, i.e. early maturing occur for the “germination 50% flowering” and “germination-50% maturing” periods at hybrids developed by the participation of introgressive cotton progenies. It was concluded possibility of using of them in the breeding of F1 hybrids with high heterosis. The cotton progenies PL-4684-86/16 of; PL-470/1/16; PL-58/16 and PL-588/16 and hybrid combinations PL-4679-81/16 x Jarkurgan; PL-58/16 x Jarkurgan; PL-200/16 x Jarkurgan; PL-4747-48/16 x Jarqurgan and PLBSG/16 x Jarqurgan developed through introgressive selection method were recommended to be widely used in studies on improvement of early maturity

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

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