The effects of some factors on reproductive performance of DVN1, DVN2 sows from Canada Duroc genetic resource
This study was carried out at Thuy Phuong Pig research and development center from 2017 to March 2021 in order to evaluate effects of sow line, generation, parity on the reproductive performance of DVN1 and DVN2 sows which was selected from Canada genetic resource. The reproductive traits were collected from 150 DVN1 sows (450 litters), 150 DVN2 sows (450 litters) and analyzed in SAS software (version 9.4). The results showed that the total number born (10.76 piglets), number born alive (10.34 piglets), number alive to weaning (9.70 piglets), litter weight at birth (16.64 kg), litter weight at weaning (66.67 kg) of DVN1 sows were higher (P<0.05) than those of DVN2 sows (10.42 piglets, 10.03 piglets, 9.44 piglets, 15.95 kg and 65.02 kg). The age at first service, the age at first farrowing of DVN1 (218.85 and 333.57 days) were lower (P<0,01) than those of DVN2 (229.43 and 343.89 days). The total number born, number alive to weaning, individual body weight at birth, litter weight at birth, individual body weight at weaning, litter weight at weaning in both DVN1 and DVN2 sows were increased from the first generation to the third generation. The number alive to weaning, survival rate to weaning litter weight at weaning in both DVN1 and DVN2 sows were increased from the first parity to the third parity. The total number born, number alive to weaning, individual body weight at birth, litter weight at birth, individual body weight at weaning, litter weight at weaning could be improved by using DVN1 sows.
