Breeding method of spiny fast-growing stichopus japonicus strain

Abstract

The invention relates to a breeding method of a spiny fast-growing stichopus japonicus strain, which is characterized by comprising the following steps: collecting a plurality of wild stichopus japonicus groups in coastal areas of Shandong in November, screening healthy individuals from the groups as basic groups, further screening the individuals to participate in first filial generation seedling breeding through indoor overwintering maturity-promoting cultivation, and controlling the contribution rate of the individuals to first filial generation groups through the sperm / egg discharge time; after one year of indoor intermediate culture, screening and transferring large-size individuals with high growth speed to an outdoor pond enclosure for isolated culture, and controlling the strain reserving rate within 5%; and in November of the fourth year, screening the first filial generation of parent stichopus japonicus, and controlling the strain reserving rate within 5%. Through continuous two times of high-intensity strain reserving selection in the same generation, the selection intensity of each generation is controlled within 0.25%. Continuous 4 generations of breeding is carried out so as to obtain a new stichopus japonicus strain with stable heredity and spiny fast-growing character.

Description

technical field [0001] The invention belongs to the field of aquatic genetics and breeding, in particular to a method for selecting and breeding spiny fast-growing sea cucumber strains. Background technique [0002] Apostichopus japonicus, also known as sea cucumber, is mainly distributed in the shallow waters of the Asia-Pacific coast from 35° to 44° north latitude, and is a typical temperate species. Apostichopus japonicus has the functions of invigorating the kidney, nourishing essence, nourishing blood, etc., and has extremely high nutritional value. It is one of the important sea treasures in northern my country. Shallow seas and ponds near Liaoning, Hebei, and Shandong in my country are the main natural distribution areas of sea cucumbers, and they are also the main artificial breeding areas. Sea cucumber is a traditional marine treasure in my country. With the increasing demand in the consumer market, the production and breeding scale of sea cucumber in my country ha...

AI Technical Summary

Problems solved by technology

Compared with the breeding objects such as shrimp, crab, fish and shellfish, the selection and breeding of improved sea cucumbers as a whole presents the characteristics of single traits and low value of traits