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Duration of productive use of daughters from different breeding bulls of two common lines of breeding

Abstract

Results are given from studies on the influence of breeding bulls and their line identity on productive life of their daughters under conditions of Irkutsk Region. The materials for investigations were the data of electronic database SELEX. The objects of studies were high-productive Black-and-White cows of the Pribaikalskiy type adapted to conditions of Irkutsk Region and retired from the herd for the period of 2010-2014. The line identity considerably influences the period of productive use of a cow. It is revealed in more detail when assessed breeding bulls as to productive longevity of their daughters, because they have significant differences within a certain line in passing on important selection traits to their offspring. The analysis has shown that a certain sire influences in its different way the productive qualities of its offspring under similar housing and feeding conditions. It has been found that cows of different lines significantly differ in periods of productive use. The highest values of productive life were in cows of the line Reflection Sovering 198988: 4 lactations, milk yield per a day of lactation of 23.9 kg at the average duration of lactation of 1216 days. The best results on productive longevity were in daughters of the bull Grand 2171 of the line Vis Beck Ideal 933122, and made up 4.27 lactations on average. The maximum milk yield per a day of lactation, 23.4 kg, was obtained from the daughters of the bull Galley 1165; however, they were observed to have the least duration of productive use of 2.69 lactations. The line Reflection Sovering 198988 was represented by daughters of the bull Bezine 9. The duration of their productive use of 4 lactations makes it possible to conduct breeding work on this trait. For more efficient breeding for this trait, it is necessary to select breeding bulls characterized by productive longevity of daughters to be used in a herd.

About the Authors

S. L. Belozertseva
Irkutsk Research Institute of Agriculture
Russian Federation


L. L. Petrukhina
Irkutsk Research Institute of Agriculture
Russian Federation


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Review

For citations:


Belozertseva S.L., Petrukhina L.L. Duration of productive use of daughters from different breeding bulls of two common lines of breeding. Siberian Herald of Agricultural Science. 2016;(3):30-35. (In Russ.)

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ISSN 0370-8799 (Print)
ISSN 2658-462X (Online)