Rating assessment of breeding bulls of the Kholmogorskaya breed in terms of reproductive indicators in foreign and domestic breeding
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 bull of domestic selection Elf 10363 exceeds the best bull of foreign selection Aiksaer107966005 on the insemination index by 0.2, and has a shorter service period. The service period of the daughters of Aiksaer107966005 is 26.1 days longer. Also, Elf 10363 showed better results than Aiksaer107966005 in the age of the first productive insemination and the age of the first calving on 0.8 months and 1 month.
Rating assessment of breeding bulls of the Kholmogorskaya breed in terms of reproductive indicators in foreign and domestic breeding
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 bull of domestic selection Elf 10363 exceeds the best bull of foreign selection Aiksaer107966005 on the insemination index by 0.2, and has a shorter service period. The service period of the daughters of Aiksaer107966005 is 26.1 days longer. Also, Elf 10363 showed better results than Aiksaer107966005 in the age of the first productive insemination and the age of the first calving on 0.8 months and 1 month.
Influence of bulls on the reproduction indicators of daughters taking into account their productivity
The main objective of the development of dairy cattle breeding is to increase
the breeding productive characteristics, taking into account the preservation of the
reproductive qualities of animals. The research was conducted on the basis of data
from the breeding plant for black-and-white cattle breeding OOO “Zazerkalie” in the
Vologda region. Bulls-improvers were determined by the complex of selected traits,
taking into account the linear affiliation: Meson 3097402441; Retirement 11720463 of
the line of the R. Sovering (1st lactation of daughters). It is recommended to use the
best breeding material (seed of breeding bulls, breeding young), which allows the next
generation to get a reliable improving effect on the selected characteristics.
Influence of bulls on the reproduction indicators of daughters taking into account their productivity
The main objective of the development of dairy cattle breeding is to increase
the breeding productive characteristics, taking into account the preservation of the
reproductive qualities of animals. The research was conducted on the basis of data
from the breeding plant for black-and-white cattle breeding OOO “Zazerkalie” in the
Vologda region. Bulls-improvers were determined by the complex of selected traits,
taking into account the linear affiliation: Meson 3097402441; Retirement 11720463 of
the line of the R. Sovering (1st lactation of daughters). It is recommended to use the
best breeding material (seed of breeding bulls, breeding young), which allows the next
generation to get a reliable improving effect on the selected characteristics.
Rating of Ayrshire servicing bull estimation according to selection features
Estimation of servicing bulls according to the offspring quality is one of the main items in selection process, which allows determining the strategy of herd improving in breeding, productive and conformation features. The research has been carried out in the Ayrshire cattle herd in agricultural production cooperative Mayskiy Plemzavod, the Vologda District, the Vologda Region. The study results has allowed ranking servicing bulls according to the daughters’ selection features and the bull named Volan 106202505 has been established to be the winner in this rating (its daughters’ milk yield of 8125kg being the highest one, strong body and milking conformation form). It is advisable to use servicing bulls of a high selection rating in the breeding stock and their offspring for the herd reproduction, which will increase productivity and improve conformation characteristics of a new generation animals.
Rating of Ayrshire servicing bull estimation according to selection features
Estimation of servicing bulls according to the offspring quality is one of the main items in selection process, which allows determining the strategy of herd improving in breeding, productive and conformation features. The research has been carried out in the Ayrshire cattle herd in agricultural production cooperative Mayskiy Plemzavod, the Vologda District, the Vologda Region. The study results has allowed ranking servicing bulls according to the daughters’ selection features and the bull named Volan 106202505 has been established to be the winner in this rating (its daughters’ milk yield of 8125kg being the highest one, strong body and milking conformation form). It is advisable to use servicing bulls of a high selection rating in the breeding stock and their offspring for the herd reproduction, which will increase productivity and improve conformation characteristics of a new generation animals.
