The aim of the work was the analysis of the exterior traits of polar foxes (Alopex lagopus L.) of different genetic groups. The researches were carried out on the group of 1 740 foxes. On the basis of the carried out analysis of the exterior evaluation traits it has been proved that the infusion of the Finnish fox blood influenced in a positive way on the dimension, color type and fur quality of the crossed animals. Polar foxes originating from the numerous litters showed generally lower dimension of an animal, worse fur quality and fur purity. However the dimension of an animal influenced in a negative way on the color type, but on the other hand, had no negative impact on the quality and fur color purity.

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