The analysis of blood variety of Latvian Blue breed cows in animal genetic resources program | Latvijas zilās šķirnes ģenētisko resursu programmā iekļauto govju asinības analīze
2018
Blumberga, I., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Jonkus, D., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
Latvian Blue (LZ) is one of two dairy cow breeds that is included in the conservation programme of local genetic resources. The aim of the study was to analyse blood (%) of Latvian Blue cows born in different years. In the study, animals born between years 2003 and 2017 were used, a total of 855 animals. Analysed animals were divided in five groups depending on the 1st and 2nd biggest percentage of different breed’s blood (percentage of blood is less than 25%, from 25.01 to 37.50%, from 37.51 to 50.00%, from 50.01 to 75.00% and more than 75.01%). The majority of analysed cows (n=302) had 37.51–50.00%, and 204 cows had 50.01 to 75.00% LZ breed blood. Only three cows had LZ breed blood percentage more than 75.01%. In Latvia, none purebred LZ cow is find. In LZ genetic resources’ population, the largest proportion of blood, other than Latvian Blue, is that of Lithuanian Grey, Holstein Black and White, Latvian Brown and Tyrol Grey. The second largest blood group is more diverse. Only 23 of analysed LZ breed cows (2.7%) had the blood of two different breeds, the rest of animals had the blood of three and more different cow breeds. With the targeted work preserving LZ breed, breeding specialists have succeeded in raising the percentage of LZ breed blood in new animal generation.
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