Genetic evaluation of litter traits and viability of desi pigs

Abstract

In a six month study ninety six Desi piglets born in the same period and year were observed for evaluation of certain litter traits, association of gammaglobulin with incidence of disease symptoms and morphological differences based on body measurements. The average birth weight, weaning weight, litter size at birth and weaning, litter weight at birth and weaning were 0.827 ± 0.020 kg, 6.36 ± 0.156 kg, 8 ± 0.520, 6 ± 0.325, 6.621 ± 0.477 kg and 38.160 ± 2.48 kg, respectively. Influence of different factors on birth and weaning weight were worked out by Least squares analysis of variance. The pre-weaning mortality was 25.865 ± 3.107 per cent. The mortality percentage was worked out with respect to birth weight and the causes for the mortality were recorded based on post mortem findings. Maximum mortality occurred in piglets with 0.5 kg weight and below at birth. Gastro-enteritis and pneumonia were found to be the common causes ofpre-weaning mortality. The body weights and body measurements up to 180 days were recorded at monthly intervals. The average body weight at sixth month of age was 25.670 ± 0.250 kg. Maximum growth rate was found from the fourth to sixth month. Body weights and body measurements were positively correlated at all ages. The post- weaning body weight was most influenced by body length. The total body surface area of Desi and Large White Yorkshire pigs were computed by dividing the body into different geometrical figures. Desi pigs excelled the Large White Yorkshire in surface area per kg body weight and the difference was significant (Pgarnmaglobulin was estimated by Zinc Sulphate Turbidity Test and the factors influencing its level were determined by Least squares analysis of variance. Sire, litter size and incidence of diarrhoea had significant (P<0.05) association with serum gammaglobulin level. Serum gammaglobulin level was positively correlated with post-weaning body weights.