Performance of Co pig nucleus herds in three generations
The experiment was carried out in Breeding Center belonging to the Institute of Research and Development, Hue Agriculture and Forestry University from 2018 - 2019 to evaluate performance of Co pig nucleus herds in three generations. Experiment I was conducted to monitor a total of 20 original generation sows and 20 first generation sows; In each generation, gilts and pregnant sows were randomly divided into 4 groups (corresponding to 4 replicates), each group consisted of 5 pigs; gestation period II to farrowing stage, raising 1 sow per lot; Experimental pigs are raised in barn with a yard, ensuring uniformity in age, weight and care and nurturing regime. Experiment II was conducted on young boars and gilts. The boars and gilts are randomly divided into 4 lots (corresponding to 4 replicates), each group consists of 5 pigs, the pigs are raised in barn with a yard, ensuring uniformity in age, weight and nurturing care; The follow-up time starts when the boars and gilts are 60 days old until they are 8 months old.
The results showed that first estrus age, first mating age, first farrowing age of the nuclear Meo pigs reduced via generation from 221.64 day to 216.21 day, 258.16 day to 241.28 day and 372.85 day to 355.65 day, respectively. The number of newborns piglets/litter, number of newborns living piglets/litter, number of weaned piglets/litter increased from 10.9 to 11.72% compared to the original generation. The newborn piglets weight, the newborn piglets weight/litter and weaning piglets weight/litter in generation I increased from 8.47 to 34.68% compared to the original generation. The Meo pig nucleus herds in the second generation have had good growth ability, Average daily gain (ADG) in the period of 2 - 8 months was to 209.50 g/day for boars and 201.39 g/day for gilts.
