The present investigation was based on the incidence and inheritance of ephemeral fever, also known as three-day sickness (TDS), in a herd of buffaloes comprising 813 animals at National Dairy Research Institute, Karnal, India. The average incidence in calves (birth to 6 months), heifers (6 tenth to age at first calving) and adult lactating buffaloes was 8.3, 2.1 and 2.2% for the 3 age groups respectively. The season of birth did not affect the incidence whereas the year of birth had significant effect. The recurrence of TDS from birth to first lactation age indicated that only two animals (0.47%) suffered twice with TDS. The occurrence of TDS was found to be positively associated with diarrhoea, whereas its association with foot and mouth diseases was negative. Quantification of incidence of the TDS based on testing the distribution of sire progeny groups showed normal distribution of the incidence in the population. The heritability estimates based on paternal half-sib method and by regression of daughters on dam method were 0.46+^.196 and 0.232+0.25 respectively.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XI. Genetics of reproduction, lactation, growth, adaptation, disease, and parasite resistance., , 671–675, 1986
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