Cherednychenko L. Usage genofond of a potato at creation of resistance to blight of the initial selection material.

Thesis on competition of a scientific degree of the candidate of agricultural sciences on a speciality 06.01.05 - breeding and seed Prodaction Institute of sugar beet UААN, Kiev, 2000. In researches fulfilled during 1993-1999, proved necessity of engaging at creation of the initial selection material wild of resistance to blight of sorts, as among varieties accessions and in some standard is model of sort of resistance to blight S.andigenum not probably to select the forms with high and very high stability to pathogen on late and tubers. Matching methods of simulated infection blight of a material of wild sorts of a potato on various early phases of their growth both development behind efficiency and rationality is carried out. Among wild species of cultural sorts sorts perspective for search of sources of stability against blight behind late and tubers are defined. Are selected, and with usage homozygotation valuable alleles, sating crossings the sources of tag are created. The genetic control of mani festation of property as a whole and behind his components in particular is placed. For overcoming interspecific uncrossing, the methods of the intermediary and transplantation are successfully used, on the basis of that the made practical guidelines. Is carried out introgression valuable alleles, inspecting stability to blight in primary, secondary interspecific hybrids (initial nribreeding a material) and backrosses of multispecific hybrids (initial selection material.). The nature of a genetic control of resistance to blight of the created material is investigated, are selected high valuable hybrids for further usage. The possibility of creation is proved on the basis of interspecific hybridization backrosses with high and very high stability against blight of late and tubers, that in 7-8 times exceeds expression of property in best behind tag of sorts - standards. On the basis of wide genetic base of the created material are selected backrosses with group and even by complex stability against 6-7 pathogen s, and also complex of other agronomical properties. For the last created material does not yield to the best sorts - standards.