The difference between binary pig and ternary pig

At present, the most widely used breeding plan in China is A × (B × C), An is the terminal boar, B is the matrilineal male parent, and C is the matrilineal maternal parent. Among them, An is mostly Duroc, B is Landrace pig, and C is large White pig. Let's take a look at the difference between binary pig and ternary pig.

What is a binary hybrid pig?

Binary hybrid pig is also called simple hybrid pig, that is, the first generation hybrid is obtained by crossing two breeds or strains. Because of the high degree of heterozygosity, obvious heterosis, fast growth and good fattening effect, this kind of hybridization is widely used and the technical requirements are simple. For example, Landrace boar × Northeast Min pig → Changmin hybrid generation (all fattening).

What is a three-way hybrid pig?

Three-way hybrid pig, that is, three-breed hybrid pig, is a generation of hybrid sows obtained by crossing two breeds and then crossbred with the second breed of boar. The effect of three-way crossing is generally better than that of two-way crossing, and it can make full use of the first generation of hybrid sows, which can not only make full use of heterosis, increase lean percentage, but also solve the contradiction of shortage of original sows. For example, Changbai boar × Northeast Minmin pig → Changmin hybrid generation, Changmin hybrid sow × Yorkshire boar →, at this time, the Landrace hybrid pig is a three-yuan pig.

The difference between binary pig and ternary pig

Three-way hybrid pigs mainly combine the advantages of binary hybrid pigs and the advantages of terminal male parents to produce commercial pigs with fast growth speed and high lean meat percentage, in order to obtain the maximum economic benefits. Under the same production conditions, high-quality binary hybrid sows and Duroc boars were produced by three-way crossbreeding, the litter size was 15% higher than that of purebred Landrace or Landrace, and the litter weight of weaned piglets was 20% higher than that of purebred Landrace or Landrace. Because the piglets weigh more at weaning, the days from birth to fattening are less than those of purebred pigs. The growth rate and lean percentage of crossbred pigs are similar to those of purebred pigs, and will not change significantly as a result of crossbreeding.