Method for cultivating new crassostrea hongkongensis triploid rapid growth strain by using backcross breeding technology

A technology of Hong Kong oyster and triploid, which is applied in the field of cultivating a new line of Hong Kong oyster triploid growing rapidly, can solve the problems of genetic pollution of natural population, inconvenient measurement of advantages and disadvantages, and impact on marine biodiversity, etc., and it is easy to protect the property rights of the line , the effect of stable triploid rate and great promotion potential

Active Publication Date: 2022-03-22
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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Problems solved by technology

However, these backcross breeding may cause genetic pollution to natural populations and affect marine biodiversity, and the pros and cons are not easy to measure

Method used

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  • Method for cultivating new crassostrea hongkongensis triploid rapid growth strain by using backcross breeding technology
  • Method for cultivating new crassostrea hongkongensis triploid rapid growth strain by using backcross breeding technology
  • Method for cultivating new crassostrea hongkongensis triploid rapid growth strain by using backcross breeding technology

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Embodiment 1

[0036] a, Breeding of diploid fast-growing lines of Hong Kong oyster and near river oyster: ① wild collection of Hong Kong oyster Guangdong Shenzhen population, Guangdong Yangjiang population, Guangdong Taishan population, Guangxi Beihai population, Guangxi Fangchenggang population and Jinjiang oyster Guangdong Shenzhen population, Guangdong Taishan population 200 individuals from the Qinzhou population in Guangxi, transported to the southeast test site of the Zhanjiang Marine Economic Animal Experimental Station of the Chinese Academy of Sciences, and kept in the circulating seawater system at a temperature of 29-31°C and a salinity of 15ppt for 7 days; Arranged from the largest to the smallest, the top 10% individuals of the shell height were taken as parents, and the offspring of each wild population were obtained by selfing within the group. After attachment, they were arranged in three sea areas of Zhuhai, Guangdong, Taishan, and Beihai, Guangxi. Shell height, total weight...

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Abstract

The invention discloses a method for cultivating a new crassostrea hongkongensis triploid rapid growth strain by using a backcross breeding technology. The method comprises the technical links of Crassostrea hongkongensis and Crassostrea rivularis diploid rapid growth line breeding, Crassostrea rivularis triploid induction line construction, Crassostrea rivularis tetraploid rapid growth line construction, hybrid Crassostrea rivularis diploid rapid growth line construction, backcross triploid rapid growth line cultivation and the like. The Crassostrea hongkongensis backcross triploid rapid growth new strain with faster growth and significantly improved survival rate in a high-salt region is obtained by backcrossing the Crassostrea hongkongensis tetraploid rapid growth line and the Crassostrea hongkongensis hybrid diploid rapid growth line and hybridizing different ploidy. Moreover, the new strain has the triploid advantages of extremely poor fertility, good taste and quality, capability of being marketed all year round, stable 100% triploid rate and the like, also has the advantages of pure crassostrea hongkongensis of white meat, tough meat, thick shell and the like, and is an excellent new strain suitable for commercial breeding in South China.

Description

technical field [0001] The invention belongs to the technical field of shellfish genetics and breeding in marine agriculture, and in particular relates to a method for cultivating a new fast-growing strain of Hong Kong oyster triploid by using backcross breeding technology. Background technique [0002] Hong Kong oysters, commonly known as white oysters, are an important species of oysters cultured along the coasts of Guangdong, Guangxi, and Hainan in my country. They are widely loved by people in South China for their delicious taste and tender meat. In 2020, its annual output will be about 179 tons, accounting for about 32.97% of the national oyster output. Compared with the output in 2019, there is a downward trend, mainly due to reasons such as the cleaning of channel sea areas, the long breeding cycle, and the reduction of suitable sea areas. The price is gradually increasing. It can be said that it is a high-end variety of Chinese oysters. Since the team started promo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/54
CPCA01K61/54Y02A40/81
Inventor 秦艳平张跃环喻子牛
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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