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Relationships between the frequency of bovine leukosis and pedigree, body weight and milk yield of cows



Relationships between the frequency of bovine leukosis and pedigree, body weight and milk yield of cows



Trudy Latviiskoi Sel' skokhozyaistvennoi Akademii 169: 50-53



Statistical analysis of data from all 800-900 farms in Latvia from 1969 to 1975 showed a direct relationship between the number of cows culled for leukosis (actual numbers not stated) and the proportion of purebred cattle, also between leukosis frequency and body weight; an inverse relationship with the number of cows culled for low milk yield; a direct relationship between leukosis frequency and mean fat content of milk.

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