Manko O. The Rhizomania of sugar beet - selection to resistance

Manko A.A. The Rhizomania of sugar beet - selection to resistance. The dissertation for obtaining a scientific degree of the Candidate of agricultural Sciences on a speciality 06.01.05. - breeding of plants.- Institute of Sugar Beet UAAS, Kyiv, 2003. In the dissertation results of researches on creation of initial breeding materials of sugar beet resistance to rhizomania are presented. The results obtained testify to the fact, that resistance to rhizomania in the created breeding materials of sugar beet is caused by nuclear factors. It is confirmed, that the gene of resistance to rhizomania is inherited as dominant according to genetic laws. With a method of ELISA test it is confirmed, that resistance of the created plants is caused by the presence in them of a gene resistance to rhizomania Rz. The level of expressions of the gene is high and provides high resistance to rhizomania. The quantity of the realized crossings, and conditions of cultivation do not result in decreasing the character. Togetherwith resistance to rhizomania in the created breeding materials a chain of genes modifiers from the lines - donors C-48, C-50 has been introduced, which strengthen resistance of plants to other diseases. In the process of work it was established, that productivity of breeding materials resistance to rhizomania depended on genetic value of recurrent parents.