Yield and phytopathological evaluation of new hybrids of cucumber resistant to peronospora under various conditions of cultivation

Research work was carried out in "Pridnestrovian research Institute of agriculture" in film greenhouses (spring-summer and summer turnover) and in the open ground on the trellis. The aim of the work is to study the source material and create promising cucumber lines with high parthenocarp capacity, yield and resistance to downy mildew to obtain on their basis heterosis hybrids of cucumber of universal type for different growing conditions. To achieve this goal in 2013-2017. the following tasks were identified: to study the collection samples and identify the most resistant to false powdery mildew; to assess the source material and select the stable forms; to study the combinational ability of the main features and properties of parental forms and hybrids of cucumber (parthenocarpy, yield, resistance to disease); to study the variability and inheritance of the main useful features and properties; to test promising hybrids of cucumber on economically valuable features and properties. The standards were hybrids Enthusiasm (selection RF) and Claudia (Dutch selection). With the aim of creating original material parthenocarpic cucumber hybrids resistant to downy mildew, in the closed and open ground were studied 20 samples of breeding material from different countries of origin. Four maternal and six paternal forms, as well as eighteen large-hilly hybrid combinations were evaluated by the topcross method according to the complex of economically valuable traits and properties. And full diallele the scheme of the seven lines and forty-two tuberculate hybrid combinations. Regularities of variability and signs manifestation in the first generation of hybrids are studied. Given information about the inheritance of the trait of resistance to downy mildew is a promising parthenocarpic hybrid combinations of cucumber created in the Transnistrian agricultural research Institute. Highlighted is sixty-six hybrid combinations of cucumber. Three samples that showed high resistance to downy mildew, was submitted to the State varietal Inspectorate of the Republic of Moldova and Pridnestrovie under the name Condor, the Orlan and the Shegol. Condor and Shegol Hybrids are listed in the register of breeding achievements of the Republic of Moldova and all three in Transnistria for 2019.

селекция, огурец, устойчивость, поражаемость, ложная мучнистая роса (пероноспороз), партенокарпические гибриды, сорт, гибрид, breeding, cucumber, resistance, susceptibility, downy mildew, parthenocarpic hybrid variety, hybrid