Genetic studies on peste des petits ruminants in sheep.
Three flocks of, respectively, 251 Nali, 151 Marwari and 47 Indian Karakul sheep, exposed to an epidemic of pest of small ruminants (PSR) in 1994 were used in studies of disease susceptibility. Compared with adults, lambs were more susceptible to the disease. The most vulnerable group was aged between 60 and 120 days. The rates of mortality were 4.26, 7.28 and 9.16% in Indian Karakul, Nali and Marwari breeds, respectively. Breed and sex did not significantly effect susceptibility. Progeny of some sires were significantly more susceptible than were others in Marwari breed. This effect was also demonstrated using combined data from the 3 breeds. It is suggested that PSR resistant stock could be bred.