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Aquatic seed industry is an important foundation and core lifeline for the development of aquatic industry, and scientific and technological innovation in aquatic seed industry has firmly supported the status
of China's aquaculture industry as a major country.
In order to promote the high-quality development of fishery, effectively strengthen the innovation of the seed industry, explore excellent genetic resources, research and develop advanced breeding technology, create excellent germplasm, and cultivate breakthrough new varieties, the Academy of Water Sciences launched the seed industry innovation research plan in 2021, and set up a strong seed project, a training project and a catch-up project, and all 6 species of the Pearl River were included in the plan, of which the largemouth bass was listed as a strong species project
.
A series of research work has been carried out on the cultivation of high-yield and high-temperature resistant new varieties of largemouth perch and the efficient production of seedlings, and important progress
has been made.
of China's aquaculture industry as a major country.
In order to promote the high-quality development of fishery, effectively strengthen the innovation of the seed industry, explore excellent genetic resources, research and develop advanced breeding technology, create excellent germplasm, and cultivate breakthrough new varieties, the Academy of Water Sciences launched the seed industry innovation research plan in 2021, and set up a strong seed project, a training project and a catch-up project, and all 6 species of the Pearl River were included in the plan, of which the largemouth bass was listed as a strong species project
.
A series of research work has been carried out on the cultivation of high-yield and high-temperature resistant new varieties of largemouth perch and the efficient production of seedlings, and important progress
has been made.
First, on the basis of the cultivation of two new aquatic varieties of largemouth bass "Youbass No.
1" and "Youbass No.
3", which are easy to domesticate artificial compound feed, and three key technologies, large-scale propagation technology, early propagation technology and off-season breeding technology, have been cultivated in the early stage, and three key technologies of large-scale propagation technology, early propagation technology and off-season breeding technology have been established, and the Taiwan group and northern subspecies breeding group have been collected and preserved.
The high temperature resistance evaluation technology of germplasm was established, and the evaluation of germplasm from different sources showed that the orthogonal offspring (Florida subspecies× northern subspecies ♀ ♂) had the strongest high temperature resistance.
Molecular identification techniques for different subspecies and their hybrid offspring were established, and different families of largemouth bass were accurately identified.
Based on 39 established largemouth bass families, comprehensive selection
was carried out for multiple target traits.
1" and "Youbass No.
3", which are easy to domesticate artificial compound feed, and three key technologies, large-scale propagation technology, early propagation technology and off-season breeding technology, have been cultivated in the early stage, and three key technologies of large-scale propagation technology, early propagation technology and off-season breeding technology have been established, and the Taiwan group and northern subspecies breeding group have been collected and preserved.
The high temperature resistance evaluation technology of germplasm was established, and the evaluation of germplasm from different sources showed that the orthogonal offspring (Florida subspecies× northern subspecies ♀ ♂) had the strongest high temperature resistance.
Molecular identification techniques for different subspecies and their hybrid offspring were established, and different families of largemouth bass were accurately identified.
Based on 39 established largemouth bass families, comprehensive selection
was carried out for multiple target traits.
Second, the genetic diversity analysis of 10 different source groups was completed, the whole genome sequence map and high-density genetic linkage map were drawn, and a number of trait-related molecular markers were mined; Sexual control breeding technology was initially established, and sex-specific molecular markers were developed to obtain supermale fish and all-female groups
.
.
Third, with high temperature resistance as the main target trait, the cross-breeding research of largemouth black bass was carried out, and one new hybrid strain was obtained, which had obvious high temperature resistance characteristics; Taking into account the domestication rate, survival rate and body size of the main target traits of growth rate, and combining group and family selection techniques, a new strain of fast-growing largemouth perch "Cadafon" was obtained, which has obvious growth advantages, fast growth, high feed utilization rate and good
body shape.
body shape.
The fourth is to establish rapid detection technology for specific viruses, formulate SPF seed cultivation operation specifications, rely on cooperative enterprises, annual production of fine seed splashes of more than 6 billion, cultivation of 3-4cm size seedlings survival rate of more than
40%.
40%.
The fifth is to create a "three-excellent" breeding model based on the selection and breeding of largemouth black bass "Youbass No.
3" species, the integration of scientific supporting breeding technology and excellent breeding environment regulation technology, so as to achieve no water change throughout the breeding process, greatly reduce the incidence of diseases, and increase the efficiency by 18-25%
by more than 15 days in advance.
3" species, the integration of scientific supporting breeding technology and excellent breeding environment regulation technology, so as to achieve no water change throughout the breeding process, greatly reduce the incidence of diseases, and increase the efficiency by 18-25%
by more than 15 days in advance.
