Technique for preparing hermaphrodite scallop interspecific hybrid fingerlings

Abstract

The invention provides a technique for preparing hermaphrodite scallop interspecific hybrid fingerlings, which relates to a marine shellfish breeding technique. Purple scallops and bay scallops are fattened and induced to be mature respectively so as to reach sexual maturity at the same time, and then are synchronously induced to lay eggs and discharge sperms respectively, so that sperms and eggs of two types of scallops are obtained respectively to perform interspecific cross insemination. The purple scallops and the bay scallops are hermaphrodite, both belong to an Argopecten category, have the same number of chromosomes, and have complementary superiority and traits. Hybrid groups are high in both fertilization rate and hatching rate and normal in larvae development. Two types of scallop parents adopted have complementary superiority and traits, thereby having significant heterosis in size, growth, adaptability and other aspects. As two types of scallops are both hermaphrodite, parent scallops are easy to purifym and the offspring with greater heterosis can be obtained by hybridizing the purified parent scallops.

Description

Technical field: [0001] The invention relates to a marine shellfish breeding technique, in particular to a technique for preparing interspecific hybrid seedlings of hermaphroditic scallops. Background technique: [0002] The scallop aquaculture industry in northern my country is currently dominated by bay fans (Argopectenirradians), and the output and aquaculture area account for more than 50% of the scallop aquaculture. The bay scallop grows fast, has a wide range of temperature adaptation (-1~31℃), and has strong stress resistance. It is very suitable for farming in the northern seas of my country. The price is lower than similar products, so the existing domestic bay scallop varieties cannot meet the needs of export. [0003] Purple scallop (Argopecten purpuratus) is a fast-growing medium-sized scallop native to the South Pacific. It can reach commercial size (9cm) after 13-18 months of growth, and the maximum shell length can reach 15cm. The purple scallop has a large s...

AI Technical Summary

Problems solved by technology

However, purple scallops have a narrow temperature adaptation range (8-22°C), and it is difficult to spend summer and winter in the northern seas of my country, so they cannot be directly cultured in the northern seas of my country.