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Common intertidal shellfish high-yield anti-adversity seed selection method

A shellfish and tidal flat technology, applied in the field of high-yield and stress-resistant varieties, can solve the problems of unit yield reduction, individual miniaturization, poor stress resistance, etc.

Active Publication Date: 2009-02-11
DALIAN FISHERIES UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the cultivation of tidal flat shellfish, there are some adverse phenomena such as unclear basic status of germplasm resources, quality decline, poor stress resistance, individual miniaturization, and reduced unit yield.
Moreover, the breeding objects are all wild types, and there are no artificially bred high-yield and stress-resistant varieties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The first step, selection of raw materials: In July 2006, a healthy second-year-old Dalian wild-type population with no damage to the shell, regular shell shape, strong vitality, and 600 grains was selected.

[0018] The second step is to obtain breeding materials: after 8 hours of drying in the shade, the male product is induced to oviposit and ovulate the parents. 1 male parent and 3 to 5 female parents were mated to establish 75 families. Under the conditions of the same water environment and the same breeding density, 42 families of offspring were bred through intermediate breeding and rearing. In the first-year-old gonad maturation stage of clam philippines, the No. 17 family with the fastest growth rate was screened out based on shell length, survival rate and yield (yield=average shell length×survival rate), and its growth traits increased by 16.7%. The No. 11 family with the highest survival rate and yield increased 19.2% in survival traits and 18.38% in yield....

Embodiment 2

[0022] The first step, selection of raw materials: In September 2006, a healthy second-year-old Dalian wild-type population with no damage to the shell, regular shell shape, strong vitality, and 800 grains was selected.

[0023] The second step is to obtain breeding materials: broilers are dried in the shade for 12 hours to stimulate oviposition and sperm discharge. One male parent mated with 3 to 5 female parents to establish 45 families. Under the conditions of the same water environment and the same breeding density, 37 offspring generations of families were bred through intermediate breeding and rearing. In the first-year-old gonad maturation stage of the clam philippines, with the shell length, survival rate and yield (yield=average shell length×survival rate) as indicators, the No. 5 family with the fastest growth rate was screened out, and its growth rate increased by 20.64%; The No. 18 family with the highest yield increased by 24.56%, and the No. 27 family with the h...

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Abstract

The invention relates to a breeding method of a common mudflat shellfish with stress resistance and high yield, particularly a method of adopting second instar wild type mudflat shellfish as parent to establish a sib family and selecting one family with fastest growth, highest survival rate and highest rate from the first filial generation. By choosing excellent ones for breeding from the first filial generation, the groups of two families with fastest growth and highest survival rate are carried out cross-breeding, the fine strain with highest yield is chosen which is carried out the above breeding, and finally the fine variety with stress resistance and high yield is obtained. The advantage of the method is that the genes with economic character in the family can be purely combined fast, thus obtaining a new variety with high yield, stable yield and stress resistance. The family material can be used for study the hereditary property of mudflat shellfish so as to construct the gene linkage map of the mudflat shellfish.

Description

technical field [0001] The invention relates to a method for breeding high-yield and stress-resistant varieties of common tidal flat shellfish. Specifically, the second-age wild type tidal flat shellfish is selected to establish a sibling family, and through directional selection and hybridization of the first and second generations of the family line, the high-yield is finally obtained. Stress-resistant varieties. Background technique [0002] With the improvement of people's living standards, tidal flat shellfish are in short supply in both domestic and foreign markets, and the market potential is huge. At present, in tidal flat shellfish breeding, there are some unfavorable phenomena such as unclear germplasm resources, quality decline, poor stress resistance, individual miniaturization, and unit yield reduction. Moreover, the breeding objects are all wild types, and there are no artificially bred high-yielding, stress-resistant varieties. Therefore, it is an important ...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 闫喜武霍忠明张跃环杨凤张国范张澎赵力强赵生旭
Owner DALIAN FISHERIES UNIVERSITY
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