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Lately, genetic factor involvement in climate change response is of great importance. Addressing some issues regarding the behavior of agronomic characters of production in a set of hybrids may lead to recommendations on the choice of the most suitable hybrids for growing in Transylvanian Plateau. Thus, in 2016, we set up an experience in two locations of Cluj county, Turda and Viişoara, on the lower terrace of Arieş river. Biological material chosen for this study was represented by seven hybrids, of which six indigenous Prima, Estival, Estival M, Dulcin, Deliciul Verii (released by SCDA Turda), Delicios (INCDA Fundulea) and foreign hybrid Jubilee (produced by Syngenta). The earliest hybrids Prima and Estival, have the lowest average number of grains/row, with very significant differences compared to control (experience average). Estival, Estival M and Jubilee hybrids show the highest number of rows of grains/cobs, with very significant differences over the average.