Adaptivity and stability parameters of heterotic tomato hybrids (Solanum lycopersicum L.) in soil greenhouses

Varieties and hybrids which are stable in yield and suitable for cultivation in various soil and climatic zones have a particular value within the conditions of industrial production. New varieties created by breeders should be characterized by the highest yield in favorable conditions, and, at the same time, by the stable yield in other conditions, i.e. be highly accommodative. The aim of the research was to assess environmental stability and plasticity parameters of tomato hybrids according to the main characteristics of yield and then to select the hybrids F1 with high productivity and stability in soil greenhouses. The calculation of adaptive ability and ecological stability indexes was carried out according to the method of A.V. Kilchevsky and L.V. Khotyleva using the ADIS program. As a result, some hybrids were identified as heavy yielding and with high general adaptive ability according to the following parameters: early fruit yield - NikolaçLine‑2, Line‑4×Line‑2, NikolaçLine 19/3, NikolaçLine-9, Line TX-144×Irishka, Line B-3-1-8×Line 19/0, Line C-9464×Line 19/0; on the basis of “commercial fruit yield” - NikolaçLine-2, TX-144×Line-2, Line TX-144×Irishka, TX140×Line-2, Line TX-140×Line 19/3, Line B-3-1-8×Line 19/0, Line C-9464×Line 19/0; by the weight of commercial fruit - NikolaçLine 19/3, Line TX-144çLine 19/3, Line B-3-1-8×Line 19/0. Greater part of yield parameters was stable for hybrids NikolaçLine-2, Line-4×Line-2, TX-140×Line-2, Line B-3-1-8×Line 19/0, Line TX-144×Irishka. Hybrids combinations Azart and Vityaz have successfully passed the test and were recommended for planting on the territory of the Republic of Belarus. Thus, feasibility of ecological stability and plasticity assessment at the final stage of breeding process has been proven. It reduces possibility of errors in choosing hybrids for State testing procedures. Acknowledgments. The research was carried out within the framework of the State Program “Innovative Biotechnologies” for 2010-2012 and for the period up to 2015”, as well as the Interstate Target Program of the Eurasian Economic Community “Innovative Biotechnologies” for 2011-2015.