Abstract
The author examined how the distribution of blood groups in the Dutch Friesian population had been influenced by the restrictions of breeders. He found that parent cattle were paired independently of blood group. In offspring there was no selection for a certain phenotype until the end of the first year.
There were clear differences in the frequency of some genes between adult bulls and cows. The gene for blood group A was less frequent in bulls and that for blood group F was less frequent in cows. This occurred in some foreign breeds of cattle.
The distribution of blood groups over the population was not even. There were differences in gene frequency between breeding areas and in the breeding areas there were large differences between artificial insemination stations. Differences within farms and within breeding pedigrees were even greater. These differences could be ascribed largely to the use of one or only a few sires.
Original language | Dutch |
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Qualification | Doctor of Philosophy |
Awarding Institution | |
Supervisors/Advisors |
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Award date | 18 Oct 1967 |
Place of Publication | Wageningen |
Publisher | |
DOIs | |
Publication status | Published - 18 Oct 1967 |
Keywords
- blood serum
- fibrin
- platelets
- blood
- erythrocytes
- leukocytes
- blood plasma
- cattle
- dairy breeds
- netherlands
- genetics
- heritability
- genetic variation