Breeding method of hybrid bream

A breeding method and technology of bream, which is applied in the field of breeding new hybrid bream, can solve the problems of unstable biological characteristics, separation of bream traits, deterioration of meat quality of bream, etc., and achieve beautiful body shape and fast growth Fast and reduce the cost of induced labor

Active Publication Date: 2020-09-15
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in recent years, it has been found in the breeding process that due to the inbreeding of the bream, the growth of the bream has declined, the meat quality of the bream has deteriorated, the growth rate has slowed down, and it is extremely intolerant to low oxygen. The improvement of quality resources is imperative
The bream is derived from the bream strain, which has fast growth rate, strong stress re...

Method used

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  • Breeding method of hybrid bream
  • Breeding method of hybrid bream
  • Breeding method of hybrid bream

Examples

Experimental program
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Embodiment 1

[0029] A method for cultivating hybrid bream, comprising the steps of:

[0030] (1) Parent selection: During the breeding season, select the round-headed bream (♀) with a swollen abdomen, which is soft and elastic, as the female parent fish, and the bream (♂), which can squeeze out white semen by gently squeezing the abdomen, as the male parent fish Carry out special pond breeding;

[0031] (2) Artificial oxytocin: manual injection of a mixed oxytocic agent of luteinizing hormone-releasing hormone analogue and chorionic gonadotropin for artificial oxytocin, the dose of luteinizing hormone-releasing hormone analogue injected into the female broodstock is 5 μg / kg, chorionic gonadotropin The dose of gonadal hormones is 300IU / kg; the female parent fish is injected first, and the male parent fish is injected 4 hours later. The injection dose of the male parent fish is halved relative to the injection dose of the female parent fish;

[0032] (3) Natural fertilization: After the inj...

Embodiment 2

[0035]A method for cultivating hybrid bream, comprising the steps of:

[0036] (1) Parent selection: during the breeding season, select the bream (♀) with a swollen abdomen, soft and elastic as the female parent fish and the round-headed bream (♂) that can squeeze out white semen from the abdomen gently as the parent fish Carry out special pond breeding;

[0037] (2) Artificial oxytocin: manual injection of a mixed oxytocic agent of luteinizing hormone-releasing hormone analogue and chorionic gonadotropin for artificial oxytocin, the dose of luteinizing hormone-releasing hormone analogue injected into the female parent fish is 6 μg / kg, chorionic gonadotropin The dose of gonadal hormones is 380IU / kg; the female parent fish is injected first, and the male parent fish is injected 4 hours later. The injection dose of the male parent fish is halved relative to the injection dose of the female parent fish;

[0038] (3) Natural fertilization: After the injection is completed, the ma...

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Abstract

The invention discloses a breeding method of hybrid bream. The method comprises the steps: selecting the backcross progeny of female diploid F<1> hybrid (blunt snout bream x topmouth culter) x male blunt snout bream (BTB for short) (with a Chinese name of Qiaozuibian) and Megalobrama amblycephala, and performing culture in a special pond in a mating period, wherein the BTB and Megalobrama amblycephala have obvious sexual characteristics and good physical signs; performing artificial induced spawning on the parent fishes in the breeding season, performing natural fertilization, putting the obtained fertilized eggs in an incubation tank, performing incubation in running water, raising the fry after completion of fry incubation, and then performing detection and screening on the raised fry soas to obtain the improved diploid hybrid bream. Through the breeding method of the hybrid bream, ecbolic of a low dose is adopted for induced spawning, and is combined with natural fertilization, sothat smooth induced spawning and a survival rate of the parent fishes are ensured, the cost of induced spawning is reduced, and it is ensured that the fertility rate and hatching rate are not affected; and the whole breeding process is simple, the obtained improved diploid hybrid bream has the characteristics of fast growth, beautiful bodies, rich nutrition, hypoxia tolerance, good resistance to diseases, good stress resistance and the like, and the method has great significance to genetic breeding and production practice.

Description

technical field [0001] The invention belongs to the technical field of fish hybridization, and in particular relates to a cultivation method for preparing a new type of hybrid bream. Background technique [0002] Hybridization can transfer the genome from one species to another, resulting in changes in the phenotype and genotype of the offspring, making hybrid offspring exhibit heterosis in terms of meat quality, disease resistance, stress resistance, and growth rate. Hybridization to form fertile strains provides an important germplasm resource bank for genetic breeding, which is of great significance in genetic breeding. How to quickly form a new type of hybrid fish with existing methods and technologies is a problem to be solved by those skilled in the art. [0003] Group head bream (Megalobrama amblycephala) belongs to Cyprinidae, Cyprinidae, Cyprinidae, and bream genus. Dory bream is one of the main freshwater cultured fishes in my country and is widely loved by peopl...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 刘少军龚丁斌罗凯坤覃钦博王跃群徐丽慧陶敏张纯赵如榕汤陈宸吴昌胡方舟王余德王石刘庆峰
Owner HUNAN NORMAL UNIVERSITY
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