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Molecular breeding method aiming at body size character and application of molecular breeding method

A trait and molecular technology, applied in the field of livestock breeding, can solve problems such as reducing the genetic progress of growth traits, and achieve the effect of promoting genetic improvement and improving production performance

Active Publication Date: 2022-04-12
SHENZHEN JINXINNONG FEED
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, independent selection for body size traits will reduce the genetic progress of growth traits, and it is not possible to pursue tall breeding pigs alone

Method used

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  • Molecular breeding method aiming at body size character and application of molecular breeding method
  • Molecular breeding method aiming at body size character and application of molecular breeding method
  • Molecular breeding method aiming at body size character and application of molecular breeding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In this example, the growth performance of Large White pigs was measured in the pig farm, and the body size traits of the breeding pigs were measured at the same time, and reproductive data such as the total number of litters and the number of live piglets of the large white sows were collected. After collecting the data, correct the age, backfat thickness, body length, and body height, and calculate the age at 100kg body weight, backfat thickness at 100kg body weight, total litter size, body length at 100kg body weight, and body height at 100kg body weight. The breeding value of the trait. According to the breeding goal and breeding focus of the breeding farm, each trait is weighted according to a certain weight, and finally a comprehensive selection index is obtained. Finally, according to the comprehensive selection index, the breeding work such as selection and matching of breeding pigs is carried out. The specific method is as follows:

[0046] (1) Measure the gr...

experiment example 1

[0083] Breeding pigs were selected and mated by adding body size traits to the comprehensive selection index to evaluate the effect of this method. This experimental case is based on Large White pigs from a core breeding farm in Fujian.

[0084] The following table shows the ten individuals with excellent genetic performance (breeding ability) of reserved breeding pigs after the target group, where Index 1 (Index1) is the comprehensive selection index excluding body size traits, and Index 2 (Index2) is the comprehensive selection index including body size traits Comprehensive selection index for traits. Retaining and mating according to the comprehensive selection index including body size traits can obtain breeding pigs that are more in line with breeding needs.

[0085] It can be seen that for breeding pigs with excellent growth performance traits, using the comprehensive selection index that considers body size traits can more accurately obtain excellent individuals with b...

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Abstract

The invention relates to the technical field of livestock breeding, in particular to a molecular breeding method aiming at body size characters and application of the molecular breeding method. The molecular breeding method comprises the following steps: evaluating the breeding capability of pigs by simultaneously adopting growth shapes, breeding traits and body size traits; the body size characters comprise the body length and the body height; the growth traits comprise day age and backfat thickness, and the reproduction traits comprise total litter size. According to the present invention, the body size type character is incorporated into the existing breeding pig genome selection molecular breeding scheme, the genetic evaluation results of the body size type character and the growth and reproduction character are integrated, the breeding ability of the pig is evaluated, and the breeding method is further applied to breeding of the breeding pig so as to obtain the breeding method for evaluating the breeding ability of the pig; the method is of great significance to breeding of large boars in the future.

Description

technical field [0001] The invention relates to the technical field of livestock breeding, in particular to a molecular breeding method for body size traits and its application. Background technique [0002] At present, in the existing genetic evaluation system of breeding pigs, only the three traits of corrected age (up to 100kg body weight age), corrected backfat thickness (up to 100kg body weight backfat thickness) and total litter size are mainly evaluated and selected. Among them, for the large white pigs and Landrace pigs of the female line, the genetic evaluation and selection of the three traits are carried out at the same time; for the Duroc of the male line of pigs, the genetic evaluation and selection are only carried out for the corrected age and corrected backfat thickness. However, the large white, landrace and duroc in many breeding farms currently have the problem of short body size and few sow teats, which seriously affect the lactation performance of sows a...

Claims

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Application Information

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IPC IPC(8): A01K67/02
Inventor 冯文杨华威方铎刘剑锋周磊赵祖凯曾新斌
Owner SHENZHEN JINXINNONG FEED
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