Abstract: To investigate the reproductive performance of XS3 line sows and the parental generation sows of Xiangsha pig commercial lines, some reproductive performance data of Xiangsha pig commercial lines breeding farm from 2018 to 2023 were selected. After analysis, it was found that: ⑴ Under the pure breeding model, among the XS3 line sows in parity 1 to 7, the reproductive performance was optimal in parity 4 to 7. ⑵ Under the hybrid model, when the mating boars were Yorkshire or Landrace pigs, the reproductive performance of XS3 line sows were significantly better than when the mating boars were Berkshire pigs. ⑶ Among the parental generation sows of Xiangsha pig commercial lines in parity 1 to 4, the reproductive performance was optimal in the 4th parity. In summary, parity had a significant impact on the reproductive performance of the XS3 line sows and the parental generation sows of Xiangsha pig commercial lines, and different breeds of boars also had a significant impact on the reproductive performance of the XS3 line sows. It provided data basis for the continuous breeding of Xiangsha pig breeding lines.

Key words: Xiangsha pig, commercial lines, Shaziling pig, Yorkshire pig, Barkshire pig, Landrace pig, reproductive performance