A method for constructing a new strain of salmon trout resistant to saprolegniasis
A construction method and technology for saprolegnia, which are applied in the field of construction of new disease-resistant strains of salmon and trout, can solve problems such as the quality of salmon and trout and the impact on use safety, so as to avoid damage to the quality of commercial fish, improve the quality of aquatic products, and improve genetics. good stability
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specific Embodiment approach 1
[0016] Specific embodiment one: present embodiment salmon trout saprolegniasis new strain is constructed according to the following steps:
[0017] 1. Enter the breeding season, select individuals with severe saprolegniasis infection in sexually mature populations of salmon trout, and establish a basic population for breeding;
[0018] 2. Continue to raise and select the basic group to sexual maturity and use the nest mating design method to establish N families, and the fertilized eggs are cultivated separately according to different families;
[0019] 3. Continue to raise the broodstock and fertilized eggs after breeding, and count the death situation. When the mortality rate of the broodstock reaches 60%, eliminate the fertilized eggs of the family corresponding to the dead broodstock, and cultivate the fertilized eggs of the remaining families;
[0020] Four, rearing the fertilized eggs obtained in the previous step until the larvae ruptured the membranes and floated up, t...
specific Embodiment approach 2
[0025] Specific embodiment two: the difference between this embodiment and specific embodiment one is: salmon and trout are infected with saprolegniasis due to dragging nets, induced labor, scratching or the way salmon and trout collide with each other. Other steps and parameters are the same as those in Embodiment 1.
specific Embodiment approach 3
[0026] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: N≥30. Other steps and parameters are the same as those in Embodiment 1.
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