Productivity of sugar beet sterility maintainers on selective agricultural backgrounds with regulated abiotic factors

Abstract

Aim. To determine the variability productivity components of the sterility maintainers against the selective agricultural background; to differentiate the lines according to the environmental parameters of plasticity and stability; to select the best lines for obtaining highly adaptive heterotic hybrids. Methods. Breeding material testing against agricultural backgrounds with different combinations of controlled abiotic factors and the method of Eberhard-Russell. Results. The average yield increased by 0.4 t/ha on LGS+NNB and by 1.1 t/ha on LGS+RNB. LGS+RNB reduced sugar content in roots. The highest sugar content values were recorded in O-type 1 line on LGS+NNB (18.6%) and in the O-type 2 line on NGS+NNB (19.4%). O-type lines were differentiated according to the response to the change of abiotic factors. Conclusions. O-type lines are characterized by a specific response to the controlled abiotic factors. O-type 4 and O-type 6 lines can be attributed to intensive type. O-type 3 and O-type 5 lines are considered stable for both signs. O-type 1 and O-type 2 lines showed relative stability by yield and an intensive response to the variability of the medium by sugar content. Keywords: sterility maintainers, yield, sugar content, genotype effect, the coefficient of plasticity.