Reproductive performance and factors affecting reproductive performance of YVN1 and YVN2 sows

Abstract

This study was conducted to evaluate the reproductive
performance and factors affecting the reproductive
performance of the YVN1 and YVN2 sows in National
Pig Research and Development Center. Data were
collected from 35 YVN1 sows and 35 YVN2 sows over
three litters from 2017 to 2019. The results showed that
the breed factor affected the total number of newborn
(NB) and newborn alive (NBA), number of pig weaned
(NW), and litter weaning weight (LWW). Litter factor
effected to NBA, litter birth weight (LBW), NW, and
LWW. YVN1 and YVN2 pigs had normal reproductive
physiology. The age of the first server of YVN1 and
YVN2 was 220.36 and 222.03 days, respectively; age at
first farrowing was 335.62 and 336.63 days. YVN1 and
YVN2 sows had a high reproductive performance but
the reproductive performance of YVN2 sows was higher
than those in YVN1 sows. The NBA of YVN1 and YVN2
was 11.51 and 12.12 piglets, respectively, NW was 10.92
and 11.71 piglets, LBW was 16.46 and 17.49 kg, LWW
was 70.41 and 75.81 kg. Total number weaning pig/sow/
year was 26.68 (YVN1) piglets and 27.75 (YVN2) piglets.
Besides, the reproductive performance of the YVN1
and YVN2 sows was the lowest at first litter and slightly
increase in second and third litter.