THE USE OF STUD-TYPE KM-1 BOARS IN THE INTRODUCTORY CROSSING WITH PRECOCIOUS MEAT ANIMALS (SM-1) OF KEMEROVO BREEDING

Abstract

The paper provides the data of the introductory crossing between Precocious Meat sows SM-1 (Kemerovo breeding) and stud-type KM-1 boars. The research data showed that F1 and F2 progenies were characterized by the best fattening and meat traits. When withdrawn from the control fattening, the F1 and F2 animals examined had advantages in daily weight gain and precocity over purebred ones; they increased the indexes by 18.6-11.4 % (Р < 0.001) and 9.0-4.8 % (Р < 0.001), respectively. Hereto, it should be noted that feed costs were little different for groups and averaged a mere 3.71 feed units. The outcomes of control slaughter testify to a high enough level of meat traits in the animals examined both purebred and mixed. The gilts of the blood share 3/4SM-1 + 1/4KM-1 are observed to have the trend to decrease fat thickness from 25.2 to 24.0 mm over 6-7th thoracic vertebrae and increase meat output per carcass from 59.7 to 60.8 %. The animals from the 3rd group are marked to have the trend to increase the content of erythrocytes and hemoglobin in blood: 6.39 · 10 12/l and 100.0 g/l. The gilts of the 3rd group happened to have the content of lymphocytes higher (61.3 %) than their analogs from the control and 3rd groups. On the whole, the analysis of blood readings indicates good physiological state and high natural resistance of the examined animals’ body.