Breeding methods for high-yield and stress-resistant varieties of common tidal flat shellfish

A technology for shellfish and tidal flats, applied in the field of high-yield and stress-resistant varieties, can solve the problems of individual miniaturization, quality decline, and unclear basic status of germplasm resources

Active Publication Date: 2012-02-22
DALIAN FISHERIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 is to select the original materials: in July 2006, select a healthy second-instar Dalian wild-type population with no damage to the shell, regular shell shape, strong vitality, and population of 600.

[0018] The second step is to obtain breeding materials: after 8 hours of dry in the shade, the male product induces the parent to lay eggs and produce sperm. One male parent was mated with 3 to 5 female parents to establish 75 families. Under the same water environment and the same cultivation and stocking density conditions, 42 families of offspring were cultivated through intermediate breeding and cultivation. In the first-age gonad maturity stage of the Philippine clams, using shell length, survival rate and yield (yield=average shell length×survival rate) as indicators, the 17th family with the fastest growth rate was selected, and its growth traits increased by 16.7%. The No. 11 family with the highest survival rate and yield increased its survival trait...

Embodiment 2

[0022] The first step is to select the original materials: in September 2006, select a healthy second-instar Dalian wild-type population with no damage to the shell, regular shell shape, strong vitality, and the population number of 800.

[0023] The second step is to obtain breeding materials: the parent shells are dried in the shade for 12 hours to stimulate oviposition and sperm. One male parent mates with 3 to 5 female parents to establish 45 families. Under the same water environment and the same breeding and stocking density conditions, 37 families of offspring were cultivated through intermediate breeding and cultivation. In the first-age gonad maturity of the Philippine clams, using shell length, survival rate and yield (yield = average shell length × survival rate) as indicators, the fastest growing family No. 5 was selected, and its growth rate increased by 20.64%; The 18th family with the highest rate increased its survival rate by 24.56%; the 27th family with the hig...

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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, it selects second-instar wild-type tidal flat shellfish to establish a sibling family, and through the directional breeding and crossing of the first and second generations of the family, high yield is finally obtained Excellent varieties of stress resistance. Background technique [0002] With the improvement of people's living standards, the supply of tidal flat shellfish in domestic and foreign markets is in short supply, and the market potential is huge. At present, in the breeding of tidal flat shellfish, there are unclear germplasm resources, quality decline, poor resistance, individual miniaturization, and unit yield reduction. Moreover, the breeding objects are all wild-type, and there is no artificially cultivated high-yield, stress-resistant fine variety. Therefore, genetic improvement of tidal flat shellfish and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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