Improving the fiber quality indicators of upland cotton (G. hirsutum), which is planted on 95% of the world sown area under this crop, is one of the main tasks of the global cotton breeding program. This aim requires obtaining new promising cotton varieties by introducing innovative developments into the cotton selection, in particular, marker-associated selection (MAS) technology.This article describes the results of molecular genetic analysis and assessment of fiber quality parameters in a hybrid combination BC2F1 (Sulton × L-141), obtained using the MAS program. It was found that the indicators of the fiber quality in the genome of the backcross hybrid have significantly improved compared to those of the recipient variety Sulton. In addition, the correlation of signs of the fiber quality in BC2F1 hybrids was studied.
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