Abstract: Jinfen White pig was a new lean-type variety by crossing Mashen pig, Taihu pig, Landrace, Yorkshire pig and selecting by means of combining the marker assisted selection with systematic breeding. The selection of growth and development of six generations showed that compared with the base population, body weight at birth, body weight at weaning, body weight at 70-day-old, body weight at 180-day-old, and average daily gain during the period of 70 to 180 d of boars at the sixth generation were remarkably increased by 0.13 kg, 0.56 kg, 1.69 kg, 12.46 kg and 107.00 g, respectively (P<0.05). Compared with the base population, body weight at 180-day-old of gilts at the sixth generation was significantly increased by 10.84 kg (P<0.05). Body weight at birth, body weight at weaning, body weight at 180-day-old and average daily gain during the period of 70 to 180 d of gilts and boars at the fourth and fifth generation were significantly higher than these traits of the base population, respectively (P<0.05). It indicated that growth and development performances of Jinfen White pig had made significant genetic progress.

Key words: Jinfen White pig; growth and development; genetic progress