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An analysis of the incidence of lethal genes in Polish Black-and-White Lowland bulls in a progeny-testing district

, : An analysis of the incidence of lethal genes in Polish Black-and-White Lowland bulls in a progeny-testing district. Prace i Materiay Zootechniczne (33): 17-28

Data were obtained on 26 herds, involving 7821 inseminations, 2978 cows, 584 heifers and 12 sires. Of 3562 calves, 1629 were 1708 were and 225 were stillborn.

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