Influence of the level of the Breeding Value of father on the reproductive abilities of daughters

DOI: 10.26155/vet.zoo.bio.202006008
UDC 636.22 / 28.082

Authors

E. V. Arlimova
Researcher, Laboratory of Genetics and Selection of Ayrshire Cattle; Russian Research Institute of Farm Animal Genetics and Breeding – Branch of the L.K. Ernst Federal Science Center for Animal Husbandry St. Petersburg, Russian Federation

Abstract

Studied the influence of the level of Breeding Value for milk yield of Father’s (BVF ) (less than – XNUMX kg of milk – disprove; –XNUMX +XNUMX kg of milk – neutral; +XNUMX and more kg of milk – improvers) on the reproductive ability of daughters (Fertility Index – FI): ≥XNUMX – good; XNUMX– XNUMX – medium; ≤ XNUMX – low). As a result of studies, it was found that with an increase in BVF for milk yield, the relative number of animals with a Breeding Value for milk of Daughters (BVD ) decreases from –XNUMX kg from XNUMX to XNUMX% and increases from BVD +XNUMX and more kg of milk from XNUMX to XNUMX%. With a higher milk yield within the groups of first-calving cows by BVF , the FI decreases by XNUMX*** units at p

Keywords

cow, Breeding Value, FI, Ayrshire breed, selection, bull.