Selection of reserve sows

1. Selecting reserve sows from the offspring of excellent boars and sows: when selecting reserve sows, we should try to understand the production performance of their parents and their lineal blood relatives. Backup sows should be selected from the offspring of excellent boars and sows with high feed reward, fast weight gain, good meat quality, high slaughtering percentage, good motherhood, high litter yield, strong lactation ability, rapid growth and development of piglets, heavy weaning body and strong adaptability.

two。 Select the breed characteristics of reserve sows: the body surface requirements are head shape, bright eyes, good motherhood, flat shoulder and lunar nail, wide and deep chest, straight and long waist, broad buttocks, plump muscles, moderate thickness of limbs, strong and strong, proper posture, coordination and symmetry of all parts of the body, normal development of nipples, more than 6 pairs of effective nipples, neat arrangement, moderate thickness, equal distance, and obvious characteristics. The fur is sparse, short and shiny, smooth and elastic. Wang Xiaohui