The aim of the scientific research conducted in 2022-2023 in film greenhouses and open ground was to evaluate a set of the main useful traits (early, total and standard fruit yield) and study the heterosis effect in six hybrid combinations of parthenocarpic cucumber created on the basis of the maternal form ZhL-85. One of the main issues in cucumber plant breeding is the nature and degree of heterosis depending on the parental forms involved in the crossing and growing conditions (open and protected ground). The main source material was the institute's selection samples - the maternal form ZhL-85 and paternal lines 79, 81, 84, 101, 103, E-23. The studies were conducted using generally accepted standard methods in solar-heated film greenhouses and open ground. New hybrid combinations of parthenocarpic cucumber were obtained, and high positive competitive heterosis was revealed over the years in three of them when grown in film greenhouses and open ground. According to the results of the studies, the most promising and competitive samples for the main economically valuable traits are parthenocarpic heterotic hybrids of universal purpose F1 85 x 101, F1 85 x E-23 and F1 85 x 103. These hybrids are early maturing, characterized by a high degree of parthenocarpy, bouquet type of flowering (1-5 ovaries are formed in one node), friendly return of early and high yield of standard crop, with beautiful, even, short fruits of gherkin type (shape index 3.2-3.6), white-spined, medium-tuberculate, highly transportable, dark green in colour, intended for fresh consumption and canning; tolerant to downy mildew and resistant to bacteriosis and true powdery mildew.

cucumber, hybrid combination, parthenocarpy, productivity, heterosis effect, competitive heterosis, film greenhouse, open field

agronomy

Presentation: poster