Population characteristics of daughters of domestic and foreign breeding bulls

• DOI: 10.36871/vet.zoo.bio.202102004
• Publication Date: 2021-03-15T17:36:21Z
• Authors: N. I. Abramova; O. L. Khromova; ; M. O. Selimyan

The use of foreign-bred bulls leads to changes in the genetic structure black-and-white breed population, which affects level population characteristics. study was conducted comparative variability and heritability productive reproductive characteristics daughters sires domestic foreign selection pedigree livestock 10 250 cows 1st calving modern black-motley Vologda region. superiority offspring average indicators all studied traits established with confidence (P<0,001). There were no significant differences descendants bulls. According traits, greatest for milk yield 305 days lactation Cv = 17,3 – 17,7%, therefore, on this trait will be more effective. share influence bullsfathers, both selection, total sum factors determining value breed, is determined by η2 0,22 0,24, age fruitful insemination first 0,24 0,25. In further breeding work it necessary obtain producers that exceed