Breeding technology for Megalobrama amblycephala pujiang No.1 model

A technology with selectivity and improved varieties, applied in the breeding field of Tuantou bream Pujiang No. 1, which can solve the problems of long breeding cycle and so on.

Inactive Publication Date: 2003-10-22
李思发
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because fish generally take 3 to 4 years to reach sexual maturity, plus 12 to 16 years for breeding for 4 generations, and 18 to 28 years for 6 to 7 generations to achieve genetic stability, the breeding cycle is long.

Method used

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  • Breeding technology for Megalobrama amblycephala pujiang No.1 model
  • Breeding technology for Megalobrama amblycephala pujiang No.1 model
  • Breeding technology for Megalobrama amblycephala pujiang No.1 model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Acquisition of candidate fish founder populations

[0066] In 1985 and 1986, two consecutive batches of broodstock of the original species of bream were introduced from the silt lake (30,000 mu) of Hubei Province. At the end of 1985, 15 female fish and 15 male fish were introduced (survival numbers), and at the end of 1986, 46 female fish and 112 male fish were introduced (survival numbers). Half of the next year's breeding offspring with these two batches of fish is the breeding line. Using the traditional group breeding method, two breeding lines were established respectively. The other half was mixed as a control line. In 1992, 2,000 fish species of that year were introduced from the lake, and a control line was added to prevent the possibility of their gene pool being lost in the artificial breeding environment.

Embodiment 2

[0068] Breeding of bream

[0069] In the breeding line obtained in Example 1, strong and well-built larger individuals are selected from generation to generation, and the total selection retention rate from fry to broodstock in each generation is about 3 / 10,000. In 1998 and 1999, the sixth generation (F 6 ). Pujiang 1 is the sixth generation (F 6 ).

[0070] The experiment was mainly carried out at the Nanhui Fish Germplasm Experimental Station of Shanghai Fisheries University. There are 5 fishponds dedicated to the breeding of bream, with a total area of ​​16 mu, and 24 fish ponds (each 28m2) on the concrete floor. 2 ). At the same time of breeding, the comparative test of growth performance was carried out generation by generation. The test method is to adopt a completely randomized block design, and compare the same pond (pond) of the breeding line and the control line in several ponds (ponds). Clipper marks. Calculate the weight gain rate and survival rate of the f...

Embodiment 3

[0072] Identification of selected breeding lines

[0073] (1) Growth rate

[0074] In the pond fish culture environment in Jiangsu and Zhejiang (polyculture of bream, silver carp, bighead carp, crucian carp, etc., yield 500-750 kg per mu, using green and pellet materials), the average daily increase of Pujiang No. 1 bream in that year It weighs 0.5g, and after 100 days (July-October) of feeding, the body weight can reach 50-60g. In the second instar stage, the average daily weight gain is 3.0g, and after 200 days (May to October) of feeding, the body weight can reach 500-600g. In the third instar stage, the average daily weight gain is 2.7g, and after 200 days (May to October) of feeding, the body weight reaches more than 1000g.

[0075] In the net-enclosed fish culture environment of Gehu Lake (single-raised bream), 50g of fish fingerlings were put in at the end of the year and at the beginning of the year, and the amount reached more than 500g before the National Day. mon...

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Abstract

The present invention provides a method for breeding improved varielies of fishes, and said method includes the following steps: a). cultivating the fishes to be bred and selected; b). in the period of fish growth selecting fishes with large body and good ratio of body length and body weight from fish group, in which its selection rate is less than 5 / 10000; c). cultivating selected fishes to make them reproduce next generation of fishes; and d). repeating step b and c for 3-10 times. Said invented method can effectively breed various fishes. The Megalobrana amblycephala pujiang No.1 model bred by said invented method not only is quick in growth, good in body form, high in purity, but also can meet the requirements for green food.

Description

technical field [0001] The invention relates to the breeding technology of fine fish species, in particular to the breeding technology of No. 1 pujiang bream. Background technique [0002] For more than 20 years, my country's fish breeding research has achieved good results, which are reflected in the following aspects: [0003] 1. Hybrid breeding [0004] Through cross-breeding technology, the following hybrid combinations with obvious heterosis have been selected from more than 100 hybrid combinations: ), lotus carp (purse red carp ♀×Yuanjiang carp ), three-hybrid carp (Heyuan carp ♀×mirror carp ), Yue carp (Lotus red carp ♀×Xiangjiang wild carp ), Furong carp (Scattered scale mirror carp ♀ × Xingguo red carp ), apple fish (Mozambique tilapia ♀ × Nile tilapia ), Oni fish (Nile tilapia ♀×Olia tilapia )Wait. [0005] 2. Group selection [0006] Group selection, also known as mixed selection, is a traditional selection method. Generally, it needs to go throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 李思发蔡完其
Owner 李思发
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