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Breeding method of a new strain of northern high temperature-resistant long oyster

A cultivation method and a long oyster technology are applied in the field of long oyster breeding, which can solve the problems of high mortality and poor quality of long oysters, and achieve the effects of rapid growth, improved oyster breeding status, and increased survival rate.

Active Publication Date: 2020-09-25
OCEAN UNIV OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for cultivating high-temperature-resistant long oysters by hybridization between different heat-resistant varieties, and the new strains of long oysters obtained are high-temperature-resistant and have a high meat yield, so as to solve the current poor quality of northern long oysters , and a high mortality rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for cultivating a new strain of northern high temperature-resistant long oyster, comprising the following steps:

[0019] a. Collection of parents: Collection of northern long oyster and Japanese rock oyster as purebred parents by molecular markers; according to the biological characteristics of rock oyster, 2-3 age rock oysters with a shell height of 10-15cm were selected as parent shells, and the shell height was selected 1-2 age long oysters with a size of 8-12cm are broodstock;

[0020] b. Simultaneous ripening cultivation: In the indoor cultivation pond, the temperature is raised to promote maturation. In order to synchronize the gonad development of the rock oyster and the long oyster, the rock oyster should be cultivated in the pond 30-45 days earlier than the long oyster. The biological minimum temperature for gonad development is above 15°C. After 2-3 days of stable growth of broodstock, raise the temperature by 1°C every day and keep the broodstock at...

Embodiment 2

[0025] Embodiment 2: utilize the long oyster new line that embodiment 1 obtains to cultivate

[0026] Yantai Zhifu Bay Breeding Sea Area

[0027] Common oyster farming is carried out by means of hanging rafts in shallow seas with ropes, and 120,000 to 150,000 oyster seedlings are cultivated per mu. After 1-2 years, they can reach commercial specifications for sale and processing.

Embodiment 3

[0028] Embodiment 3: utilize the long oyster new line that embodiment 1 obtains to cultivate

[0029] Weihai Rushan Bay Aquaculture Sea Area

[0030] Common oyster farming is carried out by means of hanging rafts in shallow seas with ropes, and 120,000 to 150,000 oyster seedlings are cultivated per mu. After 1-2 years, they can reach commercial specifications for sale and processing.

[0031] Can obtain by embodiment 1 and 3, compare with the long oyster of common species, the long oyster new strain growth rate provided by the present invention can improve more than 20%, and survival rate has improved more than 50%, and high temperature resistance has improved 3-4%. ℃, the meat yield increased by 35%. This new hybrid long oyster variety has obvious heterosis; The outstanding advantages are high temperature resistance, high survival rate, fast growth and high meat yield.

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Abstract

The invention provides a northern high-temperature-resistant pacific oyster new strain culture method. Firstly, pacific oyster and crassostrea nippona parents are collected, synchronous maturity promoting culture of the parents is performed, male and female oysters are distinguished by dissection and microscopy after sexual glands of the pacific oyster and crassostrea nippona parents are synchronously mature, mature eggs of pacific oysters and semen of crassostrea nippona are acquired, cross fertilization is performed to obtain hybrid generations of the two parents, offspring is cultured after cross groups are obtained, the first hybrid generations are determined as pacific oyster and crassostrea nippona first hybrid generations by a microsatellite molecular marker technique method, the hybrid generations are self-reproduced by a butt selection method, and a plurality of generations are continuously bred to obtain a high-temperature-resistant pacific oyster new strain. The obtained pacific oyster new strain has the advantages of high temperature resistance, high survival rate, growing rapidness, high dressing percentage and the like.

Description

technical field [0001] The invention relates to a long oyster breeding technology and method, in particular to a new strain of long oyster which is suitable for growing in the north and resistant to high temperature through cross breeding by high temperature. Background technique [0002] long oyster ( Crassostrea gigas ), because of its fast growth, strong adaptability, high fatness, low production cost, convenient management and high breeding efficiency, it has become one of the most important shellfish species in my country. Since long oysters breed in May-June, summer long oysters are not suitable for consumption due to their low glycogen content and poor taste in the breeding body. Therefore, the edible period of long oysters that are usually cultivated is generally in winter. [0003] At present, with the development of the Internet and cold chain logistics, long oysters are the most suitable aquatic products for eating raw in winter and transporting live in winter. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/54
CPCY02A40/81
Inventor 李琪于瑞海张景晓张哲
Owner OCEAN UNIV OF CHINA
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