Genetics of cattle resistance to BLV infection and leucosis was studied. It was established that the coefficient of heritability ( h2 ) of resistance to leucosis and BLV infection was 0.39 and 0.50, respectively. The differences in disease frequency to BLV infection and leucosis among lines, families, progeny of bulls were determined. The concordancy of leucosis in unisexual twins constituted 74.1%. A positive correlation does not exist between resistance of mothers and daughters to BLV infection. The correlation between resistance to BLV infection and leucosis was absent.

A. G Nezavitin, O. S Korotkevich, V. L Petukhov

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 17. Genetics and breeding of dairy and beef cattle, swine and horses, , 510–511, 1994
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