Technology for culturing unisexual hybrid scallop by utilizing purple scallop and bay scallop

Abstract

The invention discloses technology for culturing a unisexual hybrid scallop by utilizing a purple scallop and a bay scallop, which relates to shellfish breeding technology for aquiculture. The technology comprises the steps of: utilizing two congeneric hermaphroditic scallops with same chromosome number; ripening the two scallops respectively to achieve the synchronous maturity; and then synchronously inducing the two scallops to spawn and spermiate; and acquiring sperms and ovum of the two scallops respectively for interspecies cross-insemination to culture the unisexual hybrid scallop. Obtained offsprings have separated sexes, have males and females, and also have hermaphroditic individuals; ovum from female individuals in the hybrid offsprings can be inseminated by any parental sperm and normally grow; and the hermaphroditic individuals in the hybrid offsprings can be used for quickly purifying a strain.

Description

Technical field: [0001] The invention relates to a shellfish breeding technique for aquaculture, in particular to a technique for cultivating parthenohybrid scallops by using purple scallops and bay scallops. Background technique: [0002] Bay scallops (Argopecten irradians) are native to the Atlantic coast of the United States and were introduced into my country in 1982. The bay scallop grows fast, has a wide range of temperature adaptability, and has strong stress resistance. It is very suitable for farming in the northern seas of my country. At present, the output and farming area account for more than 50% of the scallop farming in my country. Due to the long-term inbreeding after the introduction, the germplasm of bay scallops has been severely degraded during the breeding process, showing that the size of commercial shellfish is getting smaller and smaller, and the mortality rate in the breeding process is high. For example, in 2007, the mortality rate of bay scallop br...

AI Technical Summary

Problems solved by technology

[0003] The bay scallop is a hermaphroditic animal, and the male and female gametes mature at the same time, and the oviposition and ejaculation also occur at the same time. After the sperm and eggs are released, they are mixed in the water immediately. obstacle

In addition, due to the inability to control the concentration of sperm during production, it is easy to cause polyspermy and fertilization of eggs, and the development of larvae is deformed. Moreover, excessive sperm concentration will easily damage the water quality and cause seedling failure.