In his book on "Genetic Resistance to Disease in Domestic Animals", Hutt (1958) contrasted the efforts made to improve disease resistance in domestic animals with those made by plant pathologists and plant breeders. He pointed out that "the latter utilize every last bit of useful genetic variation in the host species to develope varieties that can tolerate the disease". He complained that those responsible for controlling disease in domestic animals "have made little or no use of genetic differences among animals in ab ility to live with organisms that cannot be irradicated". Obviously, it is not lack of genetic variability in animal populations which explains this discrepancy. For every disease of domestic animals which had been adequately investigated for evidence of genetic resistance, such evidence has been found (Hutt, 1958). As far as poultry is concerned, this view is well founded considering the large amount of scientific evidence summarized in reviews of genetic influences on disease resistance (van Albada, 1964; Fredeen, 1965; Hartmann, 1972).

W. Hartmann

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 5. Plenary sessions, , 709–726, 1982
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