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Rating assessment of breeding bulls of the Kholmogorskaya breed in terms of reproductive indicators in foreign and domestic breeding

Submitted by red on Sat, 11/06/2022 - 21:39

The article presents the results of rating assessment of breeding bulls of the Kholmogorskaya breed in terms of reproductive indicators in foreign and domestic breeding in the North-West zone of the Russian Federation. The studies were conducted on the basis of a rating developed in the Northwest Research Institute of Dairy and Grassland Economy. 765 daughters of 18 domestic breeding bulls and 14 of foreign breeding bulls were observed. The rating of breeding bulls is established on reproductive signs of daughters.

The impact and results of using sires in dairy cattle populations in the Vologda region

Submitted by red on Thu, 30/07/2020 - 14:19

Studies were conducted on controlled populations of dairy cattle of

Ayrshire, Kholmogory, Yaroslavl, black-and-white breeds of breeding farms in the

Vologda region. It has been revealed that the sires of domestic selection have a greater

degree of influence on the productive indices of their daughters than foreign ones do.

The calculation of the breeding value of bulls in terms of their daughters’ productivity

has been carried out, and on the basis of a comparative analysis the best producers

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