How to distinguish purebred large white Landrace sows from binary hybrid sows?

The differences between purebred large white Landrace sows and binary hybrid sows are as follows:

1.By blood: The Great White Landrace sow is made up of the Great White Boar.

Pigs produced together with Landrace sows or Landrace sows and Landrace boars are fully purebred Landrace sows with a white appearance. Binary miscellaneous sows are large white landrace sows and other breeds of pigs (there are long white sows.

Duroc, local pigs and York, etc.), the sows produced by mating will generally inherit the advantages of the mother and the advantages of the father, and are more resistant to rough feeding and have a relatively longer life expectancy than the former.

2.From the appearance of the body type: the appearance of the large white long-white sow is white, the head size is moderate, the nose is straight or slightly concave, the ears are erect, the back and waist are slightly arched, the body is large, the hindquarters are well developed, and the limbs are strong; As for the binary hybrid sow, its appearance will have some distinctive characteristics of its parents, such as a white coat on the whole body, a light head and neck, forward-leaning ears, a long body, a slightly arched or straight back, full rump muscles, and thick limbs.

3.From the perspective of production and diet: the production performance of large white Landrace sows is 8 11 litters at the beginning of the parity and 11 13 sows for menstruation; Fattening pigs gain more than 700 grams per day, and consume less than each kilogram of weight gain, carcass.

The lean meat rate is more than 62%; The production performance of binary miscellaneous sows litter count: 8 11 firstborns, 9 12 sows, daily weight gain of more than 720 grams of fattening pigs, less than the weight per kilogram of weight gain, carcass lean meat rate of more than 62%.

But if you have to take a closer look, the parents are different, the advantages and disadvantages of growing up and growing up are different, and there are some differences in reproductive performance and body type. Take a look at the respective performance of Dabai and Landrace. Large white pigs have the characteristics of fast growth, good feed utilization, high carcass lean meat rate, good reproductive performance and strong adaptability, and are excellent parents for the production of commercial lean pigs.

1) Body shape and appearance: The whole body is covered with white coat, the head size is moderate, the nose is straight or slightly concave, the ears are erect, the back and waist are slightly arched, the body is large, the hindquarters are well developed, and the limbs are strong. (2) Production performance of the number of sows farrowing: 8 11 primiparous, 11 13 multiparous; The daily weight gain of fattening pigs is more than 700 grams, the consumption of material per kilogram of weight gain is below, and the lean meat rate of the carcass is more than 62%.

2 Landrace pigsLandrace pigs have the characteristics of high carcass lean meat rate, fast growth, good reproductive performance, etc., and are excellent parents for the production of commercial lean pigs. (1) Body shape and appearance: The whole body is white, the head and neck are light, the ears are tilted forward, the body is long, the back is slightly arched or straight, the buttocks are plump, and the limbs are thick. (2) Production performance: litter size of sows:

8 11 firstborns, 9 12 menstrual pigs, fattening pigs gain more than 720 grams per day, per kilogram of weight gain below the consumption of material, carcass lean meat rate of more than 62%. So there is still a difference.

Summary. The differences between the original Landrace sows and the American Landrace sows are as follows: 1. The original Landrace sows:

The limbs are strong and the lean meat rate is high. It is crossbred with French large white sows, and the genes of both sides are complementary, and the American and French binary sows produced have large bellies and deep bellies, obvious dorsal grooves, and developed buttocks, but they have late sexual maturity and high requirements for mating technology, which are suitable for large-scale pig farms. 2. White original sows:

Its reproductive performance, especially lactation performance, is excellent, and the Yingdan line binary sows are crossbred with the British line of Dabai to produce the Yingdan line with a flat body length, and the litter is slightly inferior to the American and French lines, but it is easy to breed and has good adaptability.

The differences between the original sows of the Changbai Xiaotong and the original sows of the American Changbai are as follows: 1. The original sows of the Changbai line: strong limbs, high lean meat rate.

The American and French binary sows produced by crossbreeding with French large white sows have a large belly and a deep belly, obvious dorsal grooves, and developed buttocks, but they have late sexual maturity and high requirements for mating technology, which is suitable for large-scale pig farms. 2. White original sows: its reproductive performance, especially lactation performance, is excellent, and the British line of large white crossbreeding is used to produce Yingdan line binary sows with a flat body length, litter slightly inferior to the American and French system, but easy to breed, good adaptability.

The American stock sow is better than the original sow.

The original American Wang Ze slag sow. The number of farrowing sows in the original breed is high, but the growth and development rate of the later period is not as good as that of the American line. At present, the original breeding sows of the American system are generally common in China, which can adapt to the environment of many different regions in China, and have fast development speed and strong disease resistance in the later stage.

Then why is it more expensive than the original breeding pig than the American **?

The number of litters is higher than that of the original breeding pigs, but it is not good in the later stage, and it is more suitable for local breeding than the original American sows.

What breeding pigs are better to cross with than sows to retain binary sows.

Pro, the first choice is Duroc, followed by York, Great White, Landrace boars.

How big can a sow's adult be.

Adult sows are 200 to 280 kg.

Pietran's ability to resist stress is very poor and difficult to raise. But the shape is good, and the lean meat rate is high.

It's a hero or a prawn! The most direct judgment of halo o o is that Landrace sows are relatively long, with long and large ears that are oblique downward, while large white pigs are muscular, have a moderate body length, and have oval and erect ears.

Then the ones I saw were white, thanks upstairs.

If it is big with Pidu, will the piglets produced be better than those grown up by Du? Has anyone made a comparison?