Based on the excellent local breed Liaoning black pig in Dandong City, Liaoning Province, adopting new technologies such as introduction of Duroc blood, cross-fixation, secondary breeding, homogenous selection, individual performance measurement, comprehensive index selection, marker-assisted selection, etc. After more than 20 years of cultivation, it has become a new breed of lean pig, Xindan Black Pig. Xindan black pig has the advantages of strong fertility, good meat quality, high lean meat yield, rapid growth, resistance to roughage, etc. Its reproductive performance and meat quality have reached the international advanced level, praised by experts as "the first pig in Northeast China" . Physical appearance and appearance are basically the same, the coat is black, body size is large, physique is strong, and the structure is well-balanced; the head is delicate, the ears are of medium size, slightly sagging forward, the amount is wider, and the surface is slightly concave; the mouth is straight and the thickness is moderate , Medium length; Longer body, good neck and shoulder combination, slightly curved back and wide waist; long and thick limbs, hip fullness, large but not drooping abdomen, nipple more than 7 pairs. This breed has improved the shortcomings of the original Liaoning black pig with large ear, thick skin, large abdomen and oblique septum.
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