Breeding method for selfing prior to hybridizing of whiteleg shrimp populations

A technology of Litopenaeus vannamei and group, which is applied in the field of breeding of Litopenaeus vannamei groups first self-crossing and then hybridization, can solve the problems of large investment, heavy workload, difficulty in meeting the requirements of facilities and equipment, etc., and achieve low-salt ability , the effect of fast production speed

Inactive Publication Date: 2012-07-04
FISHERIES RES INST OF FUJIAN +2
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Problems solved by technology

However, the establishment of a family line requires heavy workload, complicated process, large investment, and high risk. It is difficult for seedling enterprises in production to meet the requirements for faciliti

Method used

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Embodiment Construction

[0011] According to the breeding method of Litopenaeus vannamei populations, self-cross first and then hybridization among Litopenaeus vannamei populations, according to the requirements of fine breeding, with excellent breeding ecological environment, different sources of selection and breeding, clear genetic background, seed origin, and excellent traits vannamei group; on the premise of confirming the close relative relationship between individuals in the group, select the group with fast growth rate, high survival rate and strong disease resistance, and select individuals in the group for intra-group selfing, resulting in inbreeding self-bred progeny; select and eliminate the self-bred progeny to form a basic breeding population that has been purified by inbreeding; for basic breeding populations from different sources, select groups based on the principle of complementary traits, and perform pairing and hybridization between different groups to breed Litopenaeus vannamei se...

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Abstract

The invention provides a breeding method for selfing prior to hybridizing of whiteleg shrimp groups, which is characterized by including: selecting whiteleg shrimp populations with excellent seed sources, clear genetic background and close relation between individuals in the same population; selecting the individuals from the same population, and performing close inbreeding to produce self-bred offspring; selecting the self-bred offspring generated by close inbreeding based on merit, and establishing fundamental breeding populations subjected to inbreeding purification; selecting the fundamental breeding populations with character complementation for inter-population hybridization so as to obtain offspring seeds with heterosis. The method has the advantages that the fundamental breeding populations are established by selfing passage and selection, young shrimps produced by inter-population combined hybrid breeding are higher in resistance to low temperature and low saline, and the production speed in the cultivation period is faster.

Description

technical field [0001] The invention relates to a breeding method of first selfing and then hybridization among Litopenaeus vannamei populations. Background technique [0002] Litopenaeus vannamei is an imported species in China, and there is no natural distribution in China. The price of species imported from the United States is high, and only the first generation of offspring has excellent traits. With the increase of breeding generations, the economic traits degrade generation by generation. In order to retain the excellent characters of the introduced varieties, it is necessary to intervene by means of artificial breeding. At present, domestic and foreign studies on artificial breeding of Litopenaeus vannamei mostly adopt family selection, and the genetic background of each family is accurate, which is conducive to improving the efficiency of artificial breeding. However, the establishment of a family line requires heavy workload, complicated process, large invest...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 杨章武杨元乙卢小宁李正良郑雅友林克冰刘波张哲
Owner FISHERIES RES INST OF FUJIAN
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