Breeding of parthenocarpic cucumber hybrids for unheated greenhouses

Relevance. Cucumber is very popular and in demand in households of the population (personal subsidiary farms), as evidenced by the data on the acreage occupied under this crop in the territory of the Russian Federation (37.4 thousand hectares). Methodology. This article presents the results of evaluating the combinational ability of eight parthenocarpic inbreeding lines and testing thirteen new hybrid combinations obtained on the basis of the studied lines under the conditions of spring-summer turnover in a polycarbonate unheated greenhouse in the Moscow region in comparison with the hybrids F1 SV 4097 CV (Seminis, the Netherlands) and F1 Piligrim (Agrofirma Poisk LLC, Russia). The purpose of the scientific work is to develop productive and high-yielding heterotic cucumber hybrids with a complex of economically useful traits for cultivation in unheated greenhouses. Testing and introduction of competitive and technologically advanced hybrids into commercial vegetable production is one of the important stages of scientific research in the field of breeding. The research was carried out in ARRIVG - a branch of FSBSI “Federal Scientific Vegeculture Center” in the conditions of polycarbonate unheated ground greenhouses during 2020-2021 (Moscow region, Ramensky district). Results. As a result of evaluation of the combinational ability of parthenocarpic inbreeding lines, it was found that inbreeding lines L.21 (2.4 kg/m2), L.415 (0.8 kg/m2), L.993 (0.4 kg/m2), L.1010 (0.1 kg/m2) should be used during hybridization as a paternal component for obtaining early-ripening parthenocarpic cucumber hybrids. To develop more productive and high-yielding parthenocarpic cucumber hybrids, inbreeding lines L.21, L.415, L.1008 should be used. As a result of the research work, four hybrid combinations (L.993xL.415, L.1010xL.21, L.993xL.21, L.993xL.1008) were identified for high yield and productivity in protected soil conditions, which exceeded the standards of SV 4097 CV F1 and Piligrim F1