Pigs are an important economic crop. Take stock of which breeds of pigs there are.

Pigs are a commercial crop and come in many different varieties. Here are some common pig breeds:

1. Landrace : Landrace is one of the most common pig breeds in the world and has good growth performance and adaptability. They usually have white skin and long, wide bodies.

2. Duroc : Duroc is another common meat pig breed with reddish-brown skin and a larger body. They excel in growth rate and pork quality.

3. Tianjin Pig (Tianzhu White): Tianjin pig is a native breed in China and is widely used for pork production. They usually have white skin and medium-sized bodies.

4. English Landrace pig (Large White): The English Landrace pig is one of the most famous pig breeds in the UK and is the basis for the improvement of many other breeds. They have white skin and long, wide bodies.

5. Iberian Black: Iberian Black pig is a native breed in Spain and is widely used in the production of Iberian ham. They have dark skin and relatively small bodies.

6. Pietrain : The Pietrain is a Belgian pig breed known for its muscular development and excellent meat quality. They usually have black and white skin.

7. Hampshire: The Hampshire pig is an American pig breed with black skin and white legs and foreparts. They excel in growth rate and meat quality.

8. Pietrain-cross: Pietrain-cross pigs are obtained by crossing Pietrain pigs with other breeds. This hybrid breed is often used to improve meat quality and growth performance.

9. Berkshire: The Berkshire pig is a traditional British breed with black skin and ears. They are prized for their porky texture and flavor.

10. Tamworth: Tamworth is a British breed with reddish-brown skin and larger ears. They grow well in outdoor environments and are adaptable.

11. Sumao pig : Sumao pig is a special pig breed in Jiangsu area, also known as Northern Jiangsu black pig. They have black skin and hair, strong adaptability, and tender meat.