Аннотация:The results of a study of 42 maize hybrids of various ecological and geographical origin by a complex of economically valuable traits in the conditions of the Saratov Right Bank are presented. In order to optimize the breeding process, we used cluster analysis, which allows one to group a large array of hybrids into several groups (classes) that differ in a complex of parameters. As a result of clusterization at the 34th step of iteration, maize hybrids are grouped into 8 clusters according to the main economically valuable traits. It was revealed that the composition of the clusters differs by years of research. The same reaction similarity to environmental conditions was revealed in hybrids: Ross 140 SV and RNIISK 1; Ladozhskiy 292 MV and Ladozhskiy 298 MV; Agata and Dokuchaevsky 190; as well as hybrids Bilyar, Mashuk 171 MV, Mashuk 175 MV, and Baikal. The correct distribution of hybrids across clusters is confirmed by analysis of variance (unorganized repetition). It was established that according to all the studied signs, the differences in the clusters are significant.
