Milk productivity of the Yenisei type of red-motley breed, depending on linear accessories and first breast age

The research objective was carrying out the assessment of dairy efficiency of firstcalf heifers of the Yenisei type of red-and-motley breed depending on the age of the 1-st calving and linear accessory. The studies were carried out on the first calf heifers obtained from intra-linear selection: Vis Beck Ideal (V. B. I.)× Vis Beck Ideal, Reflection Sovereign (R. Sov.) × Reflection Sovereign, Montic Chieftain (M. Ch.) × Montic Chieftain, Roseif Sitation (R. Sit.) × Roseif Sitation, Seeling Trajan Rocket (S. T. R.) × Seeling Trajan Rocket, Pabst Governor × (P. G.), × Pabst Governor and the first-calf derived from interline crosses M. Ch. × V. B. I., M.Ch. × R. Sov., M.Ch. × R. Sit., M. Ch. × S. T. R., M. Ch. × P. G., R. Sit. × V. B. I., R. Sit. × P. G., R. Sit. × M. Ch., R. Sit. × R. Sov., R. Sov. × M. Ch., R. Sov. × V. B.I., R. Sov. × S. T. R. in the herd of breeding plant JSC "Solgon" Uzhur, district of Krasnoyarsk Region. The researches of signs of dairy efficiency of firstcalf heifers were conducted depending on linear accessory, received from intra linear selection and from cross-country of lines - depending on the age of the 1st calving...