PRODUCTIVITY INDICATORS OF A2 AND AD1 GENOME AMPHIDIPLOID HYBRIDS OF COTTON

Abstract

The article presents the results of studies to determine the productivity of A₂ and AD₁ genomic amphidiploids hybrids of cotton. Different indicators were gained based on the analysis of the obtained data on the indicator of productivity, in particular, the number of bolls per plant and the percentage of tying of full-fledged seeds in polygenetic hybrids F₁ and F₂. The main economically valuable features of the new synthetic forms of cotton are the precocity, the weight of the fiber of one boll (6-7 grams), fiber output (40-42%) and relatively high rates in relation to other varieties of the cotton with type IV fiber, which makes it possible to gather the raw cotton early. This form is characterized by the resistance to the drought, diseases and pests, high productivity and high technological qualities of the fiber. The obtained new synthetic complex hybrid forms are important for practical selection as a starting material for the creation of new varieties of intensive cotton types.