The objective of the research was to determine the effect of two methods (D and R) and 6 doses of laser treatment on 10 genotypes of spring wheat in the conditions of 2-factor field experiment. The method of randomised blocks with the use of point sowing was applied. During the vegetation the phases of development were observed in both the control plants and the plants exposed to different doses of laser rays. The fully mature plants were harvested. The plants chosen randomly from each individual field were evaluated in terms of 11 morphological characters determining the yield of a grain crop: plant height, total and productive tillering, ear length and ear density, number of spikletes, plant yield (number and weight of grain), ear yield and 1000 grain weight. The obtained results were analysed statistically. The variance analysis showed significant differences among cultivars, and the dose interaction with such morphological characters as the ear length and its density. The Duncan test was applied in order to determine homogeneous groups. The method of exposure to the laser light D (4x10-3J/cm2) significantly increased the ear length of the treated plants vs. the ear length of the control plants, whereas the method R (4x10-5J/cm2) significantly shortened the length of an ear. The D method largely lowered the value of ear density whereas the R method increased the ear density of the exposed plants vs. the same character of the control plants. The reaction of cultivars for both characters, ear length and ear density, was differentiated.