EXTERIOR FEATURES OF COWS OF THE YENISEI TYPE OF RED-MOTTLED BREED AND THEIR RELATIONSHIP
The article deals with exterior features of cows of the Yenisei type of red-mottled breed and their interrelation. The research was carried out in "Tubinsk" corporation of the Krasnoyarsk Territory. Exterior features were assessed at 1727 cows. Body weight of cows has been increasing from 565 kg during the first lactation to 619 kg during the second one. In terms of the exterior indicators, the cows corresponded to the dairy direction of productivity, the cows were characterized by blockiness, the blockiness index equaled to 131-133, the cows had relatively low legs (index of the leg length was equal to 42.3-43.2). The correlation coefficients indicate an active increase in the length of the trunk with a steady chest depth. Correlations of height at the withers and girth of the chest behind the shoulder blades, regardless of lactation, were positive and mostly very high (from r=0.33 to r=0.95). An analysis of the correlation between the depth of the chest and other exterior features showed that both positive and negative coefficients were obtained which varied from r= -0.65 to r=1.00. The interrelations between the oblique body length and chest girth behind the shoulder blades at the first and third lactations were r=0.32 and r=0.53, respectively. The correlation of chest girth behind the shoulder blades and other indicators for subsequent lactations had significant fluctuations (r=0.02-0.95), in most cases it was positive and high. The most pronounced interrelation was observed between the indicators of the first and second lactations; later the interrelation was weakening. Therefore, it is possible to use the exterior assessment and its results for the breeding process and for the organization of an effective selection, which will increase the number of dairy-type animals. The data obtained confirm the necessity of a comprehensive assessment of animals in terms of external indicators, and during a selection taking into account these characteristics.