Staged population selective breeding method of Takifugu obscurus non-toxic pedigree

Abstract

The invention relates to a staged population selective breeding method of a Takifugu obscurus non-toxic pedigree, which is used for selecting unrelated artificial freshwater aquaculture parent fishes according to the population selecting standard and the individual selecting standard. The selective breading stage comprises a preoviposition period, an artificial reproduction period, a larva period, a postlarva period, a fishseed period, a commercial fish period and a prematuration period. The method comprises the following steps of: selecting in the continuous culturing period of three to four years according to the selecting standard of each stage to selectively breed individuals not containing tetrodotoxin; stabilizing the non-toxicity character generation by generation through at least two continuous selective breeding periods to eliminate the possibility of hereditarily carrying the tetrodotoxin, and then selectively breeding non-toxic populations with rapid growth and strong stress resistance; and judging whether the whole fishes and highly toxic organs comprising livers and ovaries of commercial fishes in various specifications are toxic or not, and selecting and preserving the non-toxic populations. The method has the advantages of simple and easy execution and rapid effect taking and is suitable for selectively breeding the populations in any scales of fish fry fields.

Description

technical field [0001] The invention relates to a method for breeding fine varieties of fugu obscura, in particular to a method for selecting and breeding puffer obscura in a non-toxic family lineage stage population. Background technique [0002] At present, the source of seedlings for puffer fish breeding in my country is mainly to use puffer fish caught in the sea and some artificially mature puffer fish for seedling breeding, or to raise seedlings from fertilized eggs of puffer fish imported from abroad. Due to years of extensive farming and the lack of enough wild populations of puffer obscurus for seedlings, the species of puffer obscurus has been degraded very seriously. The breeding characteristics of puffer obscurus are: precocious maturity, poor stress resistance, reduced growth rate, commercial specifications The large size difference and other traits are seriously degraded. Therefore, through some biological means, the optimal genetic characteristics of the popula...

AI Technical Summary

Problems solved by technology

However, there is no patent report on the breeding of the perfect puffer family at home and abroad. The domestic authorized patents involving puffer are only two patents of artificial breeding CN98111600.0 and drug control breeding CN02138614.5. Family breeding ZL2006100245220 and puffer breeding ZL2006100245216 and other patents that have been applied for authorization focus on the establishment of pedigrees and the selection of excellent family varieties