Hybrids F₄ of winter triticale received in view of crossing 4 maternal forms (Galtjo, Alzo, FDT975, IGS5101) with 3 paternal forms (Purdy, F8063W1-12, LAD122/90) were an object of research. The Galtjo variety comes from Holland, breeding lines: FDT975 from France, IGS5101 from Germany, F8063W1-12 from Rumania; left forms are of domestic origin. Hybrid material was obtained from dr. Herrmann from Germany who is a test coordinator of winter triticale conducted by EUCARPIA. The experiment was conducted on a farm at Czesławice, near Nałęczów, on loess soil of brown bed. The hybrid material and parental forms were planted in dense sowing on one repeated plots of 2 m² surface, at a distance of 20 cm between rows. During full ripeness from each crossing combination and parental forms were selected single forms. The following characters were measured: plant height, spike length, number and grain weight per main spike, and weight of 1000 grains. The hybrids were differentiated in view of all features except grain number and grain weight per spike. Significant effects of general combining ability were found for plant height, spike length, and 1000-grain weight. Maternal form FDT975 increases 1000-grain weight, shortens plant height, and spike in its offspring. The effects of combining ability were different essentially for all research features. There is necessary take following hybrids of parental forms like: FDT1975, Purdy, Alzo, LAD122/90, IGS5101, F8063W1-12 into account because of increasing 1000- grain weight by height mean and spike length.
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