The difference between outer ternary and inner ternary

Sanyuan pig has strong stress resistance and obvious heterosis. At present, the most widely used breeding plan in China is A × (B × C), An is the terminal boar, B is the female parent, C is the maternal parent, in which An is Duroc, B is Landrace, and C is large White. In many cases, BC can also be interchangeable, including inner ternary pig and outer ternary pig. Now let's take a look at the difference between the outer ternary pig and the inner ternary pig.

What are the categories of Sanyuan pigs?

1. Outer ternary: the three varieties are all introduced from abroad, such as Landrace, Landrace, Duroc and so on.

2. Inner three yuan: among the three breeds, there are one or two Chinese varieties, such as Landrace, large White, Northeast Min Pig and so on.

3. Soil Sanyuan: the three breeds are all local breeds in China, such as Neijiang pig, Rongchang pig, Diannan small ear pig and so on.

Outer ternary pig

The so-called outer ternary, first of all, is ternary, that is, three breeds of hybrid pigs, and these three breeds are all exotic, our most common external ternary is generally "du grown up" outer ternary pig. The female parent, the first male parent and the second male parent are all exotic pigs, which are crossbred to produce three-way hybrid lean pigs. The three hybrid breeds of these pigs are all foreign introduced breeds (Landrace, Big York and Duroc), so they are called foreign ternary pigs.

Inner three-yuan pig

Nei Sanyuan is literally a hybrid pig of three breeds, but among the three breeds, there are local breeds of our country, that is, the female parent of the three parents is the local good breed, and the foreign breed pig is the male parent.