Method for cultivating hybridized and backcrossed marine product fries

The invention relates to a method for cultivating hybridized and backcrossed marine product fries. The method is characterized by comprising the following steps of: selecting excellent individuals that only a female area grows in a hybridized first filial generation family or group of Argopecten purpuratus and Argopecten irradians, and synchronously maturing the selected excellent individuals with excellent individuals of the Argopecten irradians; inducing the hybridized first filial generation individuals to spawn by using a conventional shade drying and temperature stimulation method so as to obtain unfertilized eggs; simultaneously, stimulating the Argopecten irradians to spawn and discharge seminal fluid, and filtering through 500-mesh bolting cloth to obtain the seminal fluid of the Argopecten irradians; and fertilizing the hybridized first filial generation eggs with the seminal fluid of the Argopecten irradians, cultivating according to a conventional method after hatching germ cells, and thus obtaining the hybridized and backcrossed marine product fries which are above 1.5 cm in shell height and used for commercial cultivation. The hybridized and backcrossed marine product fries cultivated by using the method provided by the invention simultaneously have the characteristics of the Argopecten irradians and the Argopecten purpuratus; compared with the Argopecten purpuratus, the hybridized and backcrossed marine product fries have obvious advantages on growth, individual size and temperature tolerance, therefore, the hybridized and backcrossed marine product fries can be cultivated in sea areas in the north, such as Qingdao, Dalian and the like; and, compared with the Argopecten irradians, the yield at the same year is increased by more than 50%.