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Method for breeding Sujiang pig variety

A breeding method, the technology of Sujiang pig, which is applied in the field of breeding new breeds of pigs, can solve the problems of limited conditions and is still in the research stage.

Inactive Publication Date: 2012-07-25
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the field of pig breeding in China, the vast majority of candidate genes that affect reproductive traits, growth traits, carcass traits, meat quality traits and disease resistance traits are still in the research stage due to various conditions. At the stage of the correlation of the above traits, it has not been seen that the breeding method combining gene aggregation assisted breeding technology and conventional breeding technology in each generation has not been seen in the group subbreeding of new breeds of pigs

Method used

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  • Method for breeding Sujiang pig variety
  • Method for breeding Sujiang pig variety
  • Method for breeding Sujiang pig variety

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Select two high litter size landraces to combine high litter size genes.

[0069] Crossbreed male pigs (2 heads) of Fengjing pig (Taihu pig), a local breed of Jiangsu Province, with sows (34 heads) of Jiangquhai pig, another local breed of Jiangsu Province, to produce a hybrid generation of Fengjiang pigs, eliminate the male pigs, and select the remaining females Pigs, Fengjiang sows contain 50% Fengjing pig (Taihu pig) lineage and 50% Jiangquhai pig lineage. The average litter size of the first-generation Maple Ginger sows was 12.48, the number of live piglets was 12.15, and the number of 45-day-old piglets was 11.79. The average litter size of multiparous sows was 15.54, the number of live piglets was 14.83, and the individual weight at 45 days was 8.43kg. The average daily gain of fattening pigs is 522g, the feed utilization rate is 3.14, and the carcass lean meat rate is 44%, which is 2 percentage points higher than that of Jiangquhai pigs.

[0070] Selection of M...

Embodiment 2

[0073] Introducing foreign breeds of Duroc pig genes

[0074] 22 American and Taiwanese Duroc pigs were tested by PCR-RFLP method one by one, and 4 Hal nnDuroc male pigs are crossed with Duro pigs (22 heads) as male parents and the first-generation maple ginger pigs (66 heads) as female parents to produce Dufengjiang hybrid pigs and Dudufengjiang hybrid pigs. Specific operation method: Divide 22 Duroc boars into three groups A, B, and C, with 6 to 8 heads in each group, and crossbreed 8 Duroc boars in Group A with 33 first-generation Maple Ginger sows ( ), the males and sows of Du Fengjiang were eliminated, and only Du Fengjiang sows were kept, and then crossed with 6 Duroc boars in Group C to produce Du Fengjiang males and sows, which contained 75% Duroc pig (Taihu pig) bloodline, 12.5% ​​Fengjing pig bloodline, 12.5% ​​Jiangquhai pig bloodline. In Group B, 8 Duroc boars were crossed with 33 first-generation Fengjiang sows to produce Du Fengjiang males and sows, and the ex...

example 3

[0076] The Du Du Feng Jiang pigs were mated with Du Feng Jiang to produce zero generation pigs.

[0077] Specific operation method:

[0078] Du Dufeng Jiang pig male and sow were mated with Du Feng Jiang female and boar to produce zero-generation basic population, which contained 62.5% Duro pig blood, 18.75% Fengjing pig blood and 18.75% Jiangqu pig blood.

[0079] At the age of 45 days, the first selection was carried out to select piglets with a large number of siblings, a body weight greater than 8.0kg, a black coat, a longer body shape, and a well-developed piglet.

[0080] At the age of 120 days, the second selection is carried out, and a small number of stunted growth and small body weight are eliminated.

[0081] 180 days old, according to the 180-day-old body weight, the average backfat measured in vivo, combined with the comprehensive selection index established by the three indicators of appearance score to select, and refer to the production performance of compatri...

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Abstract

The invention relates to a method for breeding Sujiang pigs and belongs to the field of industrial livestock production. The method for breeding the Sujiang pigs comprises: performing complex crossbreeding of Jiangquhai pigs and Fengjing pigs, which serve as female parents, and Duroc pigs serving as male parents to obtain a zero-generation fundamental population; and obtaining a Sujiang pig variety which has a 18.75 percent blood relationship with Jiangquhai pigs, a 18.75 percent blood relationship with Fengjing pigs and a 62.5 percent blood relationship with Duroc pigs by six generations of population continuing selection and breeding. The method combines a modern conventional breeding technique and a polygenic polymerization auxiliary breeding technique, and performs selection and breeding of multiple generations continuously. The Sujiang pigs have the advantages of large litter size, high carcass lean meat content and high-quality meat, and can produce high-quality commercial pork products.

Description

technical field [0001] The invention relates to a breeding method of a new breed of pig. Background technique [0002] In the past 50 years, the genetic improvement of pigs has mainly focused on increasing growth rate and carcass lean meat percentage. Developed countries have improved the daily gain and feed utilization of commercial lean meat pigs through long-term selective breeding under standardized feeding conditions. However, with the improvement of these performances, the muscle quality tends to deteriorate, which is subject to the fields of pig science, meat science, animal genetics and breeding, physiological and biochemical science in the world today. Scientists attach great importance to it and become a major research topic. [0003] For a long time, my country has used several major foreign breeds of lean meat pigs, such as large white pigs, landrace pigs, Duroc pigs and Hampshire pigs, to carry out binary and ternary hybridization of local pigs in our country, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K67/02A01K67/027
Inventor 经荣斌宋成义王霄燕张金存胡在朝
Owner YANGZHOU UNIV
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