EN
Some agronomic and physiological traits of 6 winter triticale F, hybrids were compared with those of parental forms in pot experiment. Occasional effects of heterosis in agronomic traits were observed in the phase of plant heading. Heterosis concerning the RuBisCo activity and the size of photosystem. It was significant in some of hybrids without heterosis of photosynthesis rate. Heterosis of grain yield was observed only in one hybrid. It was related to effects of heterosis of leaf area, shoot number and photosynthesis rate in the phase of plant heading and also to the stimulation the allocation of dry matter into generative parts of plants and thus to increasing the value of harvest index.