Method for optimizing variety of carp

A carp and variety technology, applied in fish farming, climate change adaptation, animal husbandry, etc., can solve the problems of declining economic traits and production performance, high inbreeding ratio, population genetic decline, etc., and improve economic traits and production performance. , avoid inbreeding, the effect of breed optimization

Inactive Publication Date: 2008-02-13
HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a carp species optimization method to solve the problems of high inbreeding ratio in current carp breeding and intraspecific hybrid culture, which lead to population genetic decline, economic traits and production performance decline

Method used

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  • Method for optimizing variety of carp
  • Method for optimizing variety of carp
  • Method for optimizing variety of carp

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specific Embodiment approach 1

[0007] Specific embodiment one: carp in this embodiment carries out species optimization according to the following steps: one, carry out phenotypic trait selection to individual carp, and the carp that meets the requirements is used as breeding parent; two, detect the genetic information between parents; Breeding grouping, the breeding parents are divided into at least two breeding groups, and the genetic distance between any pair of male and female individuals in each breeding group should be greater than the genetic distance between the three generations of the family; 4. The parents in each breeding group freely mate, that is, Breed-optimized carp.

[0008] In this embodiment, non-quantifiable phenotypic traits such as appearance and body shape can also be selected according to the breeding objective. In this embodiment, phenotypic traits such as body shape, weight, body size, and body color can be selected individually or comprehensively, and comprehensive production trai...

specific Embodiment approach 2

[0011] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the formula for selecting phenotypic traits in step one is: Xn = X ‾ ± 2 S , Xn in the formula is the measured value of the phenotypic traits of the parents, is the mean value of the phenotypic traits of the carp population, and S is the standard deviation of the phenotypic traits of the carp population. Other steps and parameters are the same as those in Embodiment 1.

[0012] It can be seen from the selection intensity that 1 times S means the highest selection intensity, 2 times S means the selection intensity is medium, and 3 times S means the selection intensity is the lowest. Therefore, this embodiment will be greater than the average value of phenotypic traits + twice the standard deviation and less than the average value of phenotypic traits. Carp individuals with value-d...

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this embodiment and specific embodiment one is: step 2 detects the genetic information between the parents: a. extract the breeding parent DNA; b. the breeding parent DNA is carried out PCR amplification respectively with 30 pairs of microsatellite primers Increase; c. Use map analysis software to digitize PCR amplification products; d. Import digital data into kinship analysis software for analysis and calculation to obtain genetic information. Other steps and parameters are the same as those in Embodiment 1.

[0014] In this embodiment, the breeding parents whose DNA has been extracted are to be marked, and electronic marking, conventional marking methods (cutting dorsal fins, plastic tubes of different colors and other physical marking methods) or rearing in separate pools can be used. In this embodiment, all 30 pairs of microsatellite primers may not be used, but only some of the microsatellite primers (but must be m...

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Abstract

The present invention relates to a method for the optimization of the fish variety, in particular to a method for the optimization of the carp variety, which resolves the problems that the inbreeding rate is high in the prior carp breeding cultivation and the intraspecific hybridization cultivation, thereby leading to the genetic degradation of the group and the decrease of the economic character and the production performance. The breeding procedures are: 1. performing the phenotypic character selection; 2. detecting the genetic information of the parent strain; 3. performing the reproduction grouping according to the genetic information; 4. the parent strains in each of the breeding group are free to mate with each other to get an optimized carp variety. The method of the present invention can avoid the inbreeding, so the variety can be optimized and the economic character and the production performance of the carps are obviously improved.

Description

technical field [0001] The invention relates to a method for optimizing fish species. Background technique [0002] Carp is the largest aquaculture fish species in my country and even in the world, and is the main economic aquaculture fish species in my country. However, there is a phenomenon of decline in economic traits and production performance in carp farming at present, the main reason being the inbreeding of carp. The current group selective breeding and intraspecific hybrid breeding cannot solve the problem of inbreeding. Contents of the invention [0003] The purpose of the present invention is to provide a method for carp species optimization to solve the problems of high inbreeding ratio in current carp breeding and intraspecific hybrid culture, resulting in population genetic decline, economic traits and production performance decline. [0004] The carp of the present invention carries out species optimization according to the following steps: 1. Carp individ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00C12Q1/68
CPCY02A40/81
Inventor 孙效文鲁翠云匡友谊梁利群曹顶臣
Owner HEILONGJIANG RIVER FISHERY RES INST CHINESE ACADEMY OF FISHERIES SCI
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