Data on 31 Simmental cows of 3 and 4 lactations raised in the areas different in the level of radioactive contamination was used to study the influence of radiation on immune reactivity and somatic chromosome instability of cattle. The titer of normal antibodies to sheep erythrocytes was 2.5 times higher in the cows from the contaminated area than that in the cows from the control area. The trend to increase the immune response to Salmonella dublin and Brucella abortus was observed. It was established that in the cows from the contaminated area the frequencies of aneuploid cells and the ones with chromosome breaks were revealed to exceed 1.3 (P < 0.05) and 2.1 (P < 0.001) times as much, respectively, as compared to those of analogous mutations in the animals from the area with a low level of radionuclide contamination. The frequency of polyploid cells was 1.5 times higher in the cows from area 1 than that in the animals from area 2 (P < 0.001). Keywords
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 27: Reproduction; fish breeding; genetics and the environment; genetics in agricultural systems; disease resistance; animal welf, , 354–357, 1998
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