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Use of recombinogenesis in selection of multi-growth polinators of sugar beet іn the root shape

Author(s) Parfeniuk O., , ,
Category The Agronomy
year 2019 issue Issue number 95. Part 1
pages 138-147 index UDK 633.63:631.52
DOI 10.31395/2415-8240-2019-95-1-138-147 (Link)
Abstract The results of studying the productive potential and inheritance features of economically valuable traits of sugar-fodder hybrids of different genetic structures are presented. In modern conditions, selection for heterosis is the main tool for increasing the productivity of sugar beet hybrids, potential of which is not yet fully exhausted. Particularly important in the selection of sugar beet hybrids on the basis of CMS is the proper choice of parental components of hybridization, which will ensure a high level of heterosis in the first-generation hybrids. For the creation of new genotypes of parent hybrid components, a great attention should be paid to improving of selection and genetic methods and the possibility combining of them, which will allow to obtain new recombinations of genes and to create forms with high potential of productivity that can compete with world analogues. Also, the problem of simultaneous combination in the genotype of high yield and sugar content with high technological quality of sugar raw materials is especially important in the selection process. The analysis of the inheritance of the main quantitative signs shows that in hybrids F1 usually is observed an intermediate manifestation of them in relation to parental forms. Deviation from the average indicators of parental forms is determined primarily by the degree of dominance of hereditary factors of one of the components of hybridization. According to the research results, the prevailing types of inheritance of the signs of productivity of recombinant materials of beets of different genetic structures have been established. The best plant genotypes with the optimal combination of productivity traits and root shape for the further selection of multi-growth sugar beet pollinators were identified. The valuable source material of beets of hybrid origin was obtained for repeated staged saturation crossings with high-sugar donor sources and selection new genotypes of high productive multi-growth pollinators of sugar beet with improved parameters of the root shape and partial protrusion of it above the surface of the soil.
Key words sugar beets, fodder beets, source material, sugar-fodder hybrid, hybridization, recombinogenesis, inheritance, productivity
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