Efficient screening method for parents required by preparation of fast-growing larimichthys polyactis new strain

A screening method, the technology of small yellow croaker, is applied in the field of high-efficiency screening of parents required for the preparation of new strains of fast-growing small yellow croaker, which can solve the problems of low accuracy and achieve the effect of improving accuracy

Pending Publication Date: 2021-01-01
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Abstract
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  • Application Information

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Problems solved by technology

Due to the influence of environmental factors in the breeding process, the accuracy of conventional phenotypic selection is very lo...

Method used

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  • Efficient screening method for parents required by preparation of fast-growing larimichthys polyactis new strain
  • Efficient screening method for parents required by preparation of fast-growing larimichthys polyactis new strain
  • Efficient screening method for parents required by preparation of fast-growing larimichthys polyactis new strain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Family construction

[0020] Collect about 4,000 small yellow croakers from the artificial breeding group, and raise them in the same cage until December (the group reaches about 8 months of age). Randomly select 200 small yellow croakers, measure their body weight, and sort them to determine the body weight value of the top 30%. As a standard, the remaining 3,800 small yellow croakers were measured, and the individuals with the top 30% of the body weight were selected as the first-generation parents. Live clamworms were fed to strengthen parental cultivation, and the water temperature was adjusted to maintain at 15°C to promote gonad development.

[0021] (2) PIT marker of small yellow croaker with high survival rate

[0022] At the beginning of April of the following year, male and female parents with excellent gonad development were selected. According to the mating method of 1 male parent and 1-2 female parents, 30 small yellow croaker families were constructed ...

Embodiment 2

[0039] Experiment with the method of Example 1, collect about 5200 small yellow croakers in the artificial culture group, and breed them in the same net cage until December (the group reaches about 8 months old), randomly take 200 fish, measure their body weight, and sort them to determine the size before sorting. 30% of the body weight value, using this as a standard, measure the remaining 5,000 small yellow croakers, and select the individuals whose body weight is in the top 30%, and finally obtain 589 small yellow croakers. Strengthen cultivation, control the water temperature and keep it at 16°C to promote gonad development. 34 small yellow croaker families were obtained by artificial oxytocin fertilization and hatching. All the families were raised separately in 2500L barrels, and the seedlings were regularly separated according to the power requirements. At the age of 5 months, the average body weight of each family was sampled and measured. 200 tails were mixed with PIT...

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Abstract

The invention discloses an efficient screening method for parents required by preparation of a fast-growing larimichthys polyactis new strain, and belongs to the technical field of larimichthys polyactis parent screening. The screening method comprises the steps that a larimichthys polyactis family is constructed, PIT marking is carried out on larimichthys polyactis with the high survival rate, recovering and temporary culturing are carried out on larimichthys polyactis with PIT marking finished, body mass measuring and breeding performance evaluating are carried out, and parents required by preparation of the fast-growing new strain are recognized and screened out. According to the method, the accuracy of excellent parent selection can be remarkably improved, and a foundation is laid forfast obtaining the fast-growing larimichthys polyactis new strain. By the adoption of the method, relative genetic progress of 5.38% can be obtained for each generation. By comparing breeding value selection and phenotype selection effects, it can be found that the breeding value selection accuracy is improved by 94.35% relative to phenotype selection.

Description

technical field [0001] The invention belongs to the technical field of parental screening of small yellow croaker, in particular to a high-efficiency screening method for parents required for the preparation of new strains of fast-growing small yellow croaker. Background technique [0002] Small yellow croaker ( Larimichthys polyactis ) belongs to the order Perciformes, the family Crowfish, and the genus Yellow croaker. It is a very important economic fish. It is also known as the traditional "Four Seafoods" in my country together with large yellow croaker, hairtail and squid. Since the 1970s, due to overfishing, environmental pollution, climate change and other reasons, the production of small yellow croakers has dropped sharply, and the caught small yellow croakers have shown signs of resource decline such as younger age and miniaturization. Under such circumstances, it has become an inevitable trend to carry out artificial breeding and breeding of small yellow croakers, ...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 刘峰詹炜谢庆平楼宝陈红林
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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