Study on effect of genetic and non-genetic factors on birth weight in pigs
2010
Vijay Kumar | Ravindra Kumar | Verma, S. B. | Prasad, Sushil | Praveen Kumar
The average birth weights (kg) of Desi, Tamworth and T and D were estimated to be 0.64±0.04, 0.97±0.03 and 1.05±0.03 respectively. Genetic group, season of birth and parity of dam had significant (P0.01) effect on birth weight in pigs. Litter size at birth had also significant (P0.05) effect on it. However, sex did not influence birth weight significantly. T and D and Tamworth breeds had significantly (P0.05) heavier birth weights (0.41 kg and 0.33 kg) than Desi pigs respectively. T and D had also 0.07 kg higher birth weight than Tamworth but the differences were observed to be non-significant. Winter farrowing had the highest birth weight which was significantly (P0.05) higher by 0.213 kg, 0.226 kg and 0.243 kg than rainy, autumn and summer seasons of farrowing, respectively. The heaviest birth weight was observed to be at 4th parity which did not differ significantly with the average birth weight of 7th parity. The mean birth weight at 7th parity was significantly (P0.05) heavier by 0.250 kg, 0.261 kg, 0.213 kg, 0.192 kg, 0.165 kg and 0.222 kg than 1st, 2nd, 3rd, 5th, 6th and 8th parities. Birth weight significantly (P0.05) decreased with increase in litter size at birth in all farrowings.
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