Latvijas Brūnās vecā tipa šķirnes govju izcelsmes analīze = The analysis of origin of Latvian Brown Old Type Breed Cows
2024
Dreimanis, Didzis | Jonkus, Daina
The Latvian Brown Old Type (BV) is one of two dairy cow breeds to be conserved in Latvia, and it is included in the local genetic resources conservation programme. The aim of the study was to study the origin and the blood percentage (%) of BV old type cows born in different years. The study used data on BV cows born between 2004 and the beginning of 2022. A total of 1023 dairy cows were included in the study. The origin and bloodlines of each animal were obtained from the LDC database. The dairy cows were grouped into four groups according to the year of birth and blood. According to the BV conservation programme, an animal must have a known pedigree of at least four ancestral generations from both parental sides. The animal genome must contain at least 50% of Latvian Brown breed origin. It is permissible for animal to have up to 50% admixture of blood from the related Danish Red (DS) and Angler (AN) breeds. The use of other breeds is not allowed in the selection of BV breed. The largest amount of BV breed blood (70.45%) was in cows born in 2019 and later. The percentage of the second and third study group varies by the birth period. The second group of the DS breed is stable in all analysed periods. The majority (546 animals or 53%) of the dairy cows came from the Potrimps line, and 283 daughters of the Ullors line had the highest Latvian brown old type breed percentage – 69.65%.
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出版者 Latvijas Biozinātņu un tehnoloģiju universitāte
