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Novel Variety Allogynogenetic Gibel Carp "CAS Ⅴ" to Dominate the Market

Jun 12, 2018     Email"> PrintText Size

Gibel carp, one of the most popularly cultured freshwater fish, occupies 10% of the freshwater production in China. Since 1980s, researchers from Institute of Hydrobiology (IHB) of Chinese Academy of Sciences have successively bred the improved varieties of allogynogenetic gibel carp, high-dorsal allogynogenetic gibel carp, allogynogenetic gibel carp "CAS Ⅲ".

By applying heterologous sperm gynogenesis to activate embryo development (termed allogynogenesis) and utilizing multiple reproductive modes of gibel carp, they have increased the production yields from 48,000 tons in 1983 to 3,000,000 tons in 2016, and promoted the wide application of these varieties across the country.

Over the past several years, Prof. GUI Jianfang's group at IHB has focused on basic biology and biotechnologies with particular emphasis on fish genetics and breeding, and has bred allogynogenetic gibel carp "CAS Ⅲ" and gibel carp "Changfeng". Recently, they bred a new variety allogynogenetic gibel carp "CAS Ⅴ" by applying unisexual gynogenesis and molecular module breeding technology.

Compared with allogynogenetic gibel carp "CAS Ⅲ", the new variety has two obvious advantages: growing faster with lower protein bait coefficient in the same condition, and having higher resistance against the herpesvirus CaHV and the parasitic myxosporean disease.

From 2014 to 2017, GUI's group has performed large-scale culture experiments in Hubei and Jiangsu province. The results showed that the allogynogenetic gibel carp "CAS Ⅴ" grew faster and gained higher survival rate by more than 20% than those of "CAS Ⅲ" and other varieties of gibel carps. In addition, the improved variety "CAS Ⅴ" has valuable economic traits such as easier angling and less intermuscular bones.

Through cooperation with a batch of aquatic companies, IHB aims to produce large-scale breed seeds of allogynogenetic gibel carp "CAS Ⅴ" and bring them to the market.

Aquaculture in China accounts for more than 60% of the world’s total aquaculture production, and is one of rapid growing extractive industries.

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(Editor: LIU Jia)

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