The invention discloses a construction and stock breeding method for cultured
grass carp families. The method comprises the following steps of: selecting grass carps which move actively and have high
heritability and of which the weight is 15 to 20 percent more than the average weight, as parent fishes; marking cultured grass carps by using periodic interrupt
timer (PIT) electronic labels, after sexual gland is matured, facilitating maturation by using
hormone solution, performing
artificial insemination on female and male parent fishes to obtain oosperm, performing self-
hatching, then growing seedlings, breeding fishseed, breeding one-year fishes, feeding respectively, and establishing the families; from the second year to maturation time, injecting the PIT electronic
label into the grass carps with the different families; performing
mixed culture in a same pond, and eliminating the inferior grass carps, wherein the rest families are the basic families for next generation breeding; the young grass carps, the one-year grass carps, two-year grass carps, three-year grass carps and four-year grass carps are a
critical period of family breeding; preferably choosing, and establishing the families serving as
backup parent fishes; and then matching teams, raising the seedlings and then breeding continuously. A new product with high quality, high yield and stable yield is bred by establishing the different families of the cultured grass carps; and the method is used for researching the genetic characteristic and
breed differentiation conditions by
mating the male and female fishes among the
grass carp families and
inbreeding the male and female fishes in the
grass carp family.