Commercial pork pig multiple crossbreeding method

A technology for supporting lines and hogs, applied in the field of animal husbandry, can solve the problems of slow growth of the first female parent, low lean meat rate, affecting the production efficiency of commercial hogs, etc.

Inactive Publication Date: 2014-04-23
SHANGHAI XIANGXIN ANIMALS & FOWLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the technical problems that the first female parent used in the existing mating line grows slowly, has low lean meat percentage, and the specialized line does not have specific outstanding traits, which affects the production efficiency of commercial pork pigs. The purpose of the present invention is to provide a commercial pig The breeding method of the matching line of meat pigs (abbreviated as Pudong No. 1 matching line) includes the following steps:

Method used

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  • Commercial pork pig multiple crossbreeding method
  • Commercial pork pig multiple crossbreeding method
  • Commercial pork pig multiple crossbreeding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1 hybrid combination test and combining ability determination

[0014] There are 80 pigs of Pietrain pigs (invention patent ZL200910247308.5) and Duroc pigs with no halothane recessive gene, and the ratio of male to female is 3:5. Since Meishan pigs should be used as the female parent in the hybridization process, Meishan pigs are set in the position of the female parent in the combination of matching lines. The Meishan pig group is all sows, 200 heads. The hybrid combination test was carried out according to the hybrid combination mode and quantity shown in Table 1. The three breeds of pigs were fed according to the conventional method of each pig group, and the hybrid pigs were subjected to fattening experiments and slaughter tests to determine the combining ability of each hybrid combination.

[0015] Table 1 hybrid combination

[0016]

[0017] The crossbreeding mode of A and B will affect the lean meat percentage of commercial pigs because the local ...

Embodiment 2

[0021] Example 2 Specialized strain of Pietrain pig without halothane recessive gene with high lean meat percentage

[0022] Based on the Pietrain pig herd without the halothane recessive gene selected by the Chinese invention patent ZL200910247308.5, a breeding group for the specialized strain of Pietrain pig was constructed. The selected individual boars have no genetic relationship, and there is no genetic relationship between sow families, and those with genetic defects in individuals and ancestors are not eligible for selection. There are 5 lineages in the breeding group, the number is about 120, and the ratio of male to female is 1:5.

[0023] The male and female pigs in the breeding group were mated and littered, and the piglets were selected individually and combined with siblings and half-sibs for determination. First go through the following primary selection stage: litter selection at the age of 20 days; elimination of poorly developed individuals at the age of 2 m...

Embodiment 3

[0027] Example 3 Specialized strain of Meishan pig with high reproductive rate

[0028] Meishan pigs were selected to form a breeding group for specialized strains of Meishan pigs. The selected individual boars have no genetic relationship, and there is no genetic relationship between sow families, and those with genetic defects in individuals and ancestors are not eligible for selection. There are 5 lineages in the breeding group, the number is about 120, and the ratio of male to female is 1:5.

[0029] The male and female pigs in the breeding group were mated to give birth to piglets. The piglets were mainly selected by families, and the large litters were reserved for breeding. In order to accelerate the coincidence of good genes, parent-child and half-sib backcross methods were used to moderately overlap generations. The piglets first go through the following primary selection stage: litter selection at the age of 20 days; selection of poorly developed individuals at the ...

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Abstract

The invention discloses a commercial pork pig multiple crossbreeding method. The method comprises the following steps of A) taking Pietrain pig with non-halothane allogene as the first male parent of multiple crossbreeding and Meishan pig as the first female parent of multiple crossbreeding for hybridization to obtain Pietrain-Meishan-crossed hybrid pig; B) taking Duroc pig as the second male parent of multiple crossbreeding and the Pietrain-Meishan-crossed hybrid pig as the terminal female parent of multiple crossbreeding for hybridization to obtain commercial pork pig. According to the commercial pork pig multiple crossbreeding method, the average litter size of multiparity sow of the first female parent of multiple crossbreeding is not less than 14.5; the hybrid high-quality commercial pork pig obtains an average daily gain up to more than 680 g/d (gramme per day) and a lean meat rate up to more than 64% and a feed conversion rate as little as 2.75, avoids PSE (pale-soft-exudative) meat and obtains an intramuscular fat percentage up to 2.5%.

Description

technical field [0001] The invention belongs to the technical field of animal husbandry, and particularly refers to a method for selecting a matching line for producing high-quality commercial pork pigs by utilizing local pig breed resources - Meishan pigs. Background technique [0002] In the 1980s and early 1990s, the United States, the United Kingdom and other countries mainly used Large White pigs, Landrace pigs and Duroc pigs as breeding pigs for the production of "foreign three yuan" meat pigs. After the appearance of the "supporting system", it occupied 80% of the market share in just a few years. The so-called matching line is a breeding system for breeding pigs formed through the determination of combining ability on the basis of systematic pure line selection. The traits of sexual effect, as the specific prominent traits of the strain, are also called specialized strains. Therefore, the breeding of supporting lines is a complex systematic project, and its technic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/02A01K67/027
Inventor 严国祥谈永松韩雪峻姜红菊涂尾龙张和军宋改平
Owner SHANGHAI XIANGXIN ANIMALS & FOWLS
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