For the first time, the article highlights the issue of the efficiency of cattle breeding of a new population Bukovyna zonal type of meat polled Simmental ruminants, which is relevant in the Carpathian region of Ukraine. The results of research have showed that the growth intensity of repair heifers with the genotype (3/4Simmental Canadian+ 1/16Simmental Austrian+ 1/8Simmental German+ 1/16Simmental American) from birth to 7 months of age prevails by 3.4%(P< 0.001) their improved peers with the genotype (1/32Simmental combined+ 27/32Simmental Canadian+ 1/32Simmental Austrian+ 3/32Simmental German) in the herd of the breeding plant State Research Farm “Chernivetske” of Bukovyna State Agricultural Experimental Station of Institute of Agriculture of the Carpathian region of NAAS. The difference is that the linear and mass dimensions in cattle of a new population with the genotype (3/4Simmental Canadian+ 1/16Simmental Austrian+ 1/8Simmental German+ 1/16Simmental American) increase with the raise of their heredity. Their live weight increased by