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Construction method and application of Haizi hybrid scallop maintainer line

A construction method and technology of maintainer lines, applied in the field of shellfish breeding technology--commercial hybrid scallop seedling cultivation, can solve problems such as the inability to establish male sterile line maintainer lines and restorer lines, and achieve the effect of overcoming the obstacle of self-fertilization

Active Publication Date: 2015-08-05
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in animal breeding, there have been no reports of male sterile and female fertile individuals at home and abroad so far, so it is impossible to establish male sterile lines similar to crops and their maintainer and restorer lines for hybrid breeding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Screening of male sterile individuals of sea purple hybrid scallops and breeding of their male parents: select 50 sea scallops with mature gonads and 50 purple scallops in the first year, and place each scallop in the pre-added Spawn eggs and ejaculate in a separate container in seawater at 23°C, collect the ova of each bay scallop and the sperm and eggs of each purple scallop separately, add a small amount from a single purple scallop to the egg suspension of each bay scallop Stir to mix the sperm and eggs evenly, observe under a microscope so that there are 5-6 sperm around each egg, and place the fertilized eggs in a dark environment to hatch, that is, to obtain the first-generation family of Haizi hybrids. Establish at least 20 such hybrid families with the above method, and simultaneously fertilize the fertilized purple scallop sperm eggs to establish a corresponding number of purple scallop self-bred families, and carry out larvae cultivation, seedling preservat...

Embodiment 2

[0025] At the end of March 2008, the bay scallops with mature gonads were taken, and the eggs of bay scallops were obtained after temperature stimulation. After insemination with the sperm of purple scallops, the first-generation seedlings of hybrids of bay scallops and purple scallops were obtained and raised. In the spring of 2009, the first-generation scallops of the above-mentioned hybrids were matured, and the scallops that were large and only developed in the female area were selected from them. After 30 minutes of drying in the shade, the scallops were placed in a container filled with seawater at 23°C to stimulate spawning. The sperm of the scallop was mixed and fertilized, and the backcross population of the sea purple hybrid scallop and the purple scallop was bred. Most of the backcross populations were hermaphroditic after maturation in the spring of 2010, but <10% of the individuals were still male sterile.

[0026] Continue to backcross the above-mentioned male st...

Embodiment 3

[0028] In 2012, 20 male sterile individuals in the first-generation family of Haizi hybrids were stimulated to lay eggs. These eggs were backcrossed with the sperm of a single purple scallop, and 2 were successfully obtained. When the backcrossing families were harvested in mid-November 2012, compared with the bay scallops in the same period, the shell height, shell length, shell width and weight of one of the backcrossing families increased by 28.2%, 29.5%, 16.4% and 74.0%, respectively. After maturation in the spring of 2013, it was found that most of the offspring only developed in the female region and did not develop in the male region, which proved that the male sterile line and its maintainer line of Haizi hybrid scallop can be bred by backcrossing with purple scallop sperm and male sterile individuals.

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Abstract

The invention relates to a building method and application of an Argopecten irradians irradians and Argopecten purpuratus hybrid scallop maintainer line. The maintainer line allows the corresponding male sterility line offspring of the corresponding Argopecten irradians irradians and Argopecten purpuratus hybrid scallop to have male sterile and egg fertile features. The Argopecten irradians irradians and Argopecten purpuratus hybrid scallop is the hybrid offspring of the eggs of the Argopecten irradians irradians and the sperms of the Argopecten purpuratus. The method includes: building a large amount of Argopecten irradians irradians and Argopecten purpuratus hybrid scallop first filial generation families, and finding male sterile individuals, for male sterility line breeding, in the families; using the sperms of male parent Argopecten purpuratus for continuous back crossing, and respectively breeding a male sterility line-maintainer line combination with all the offspring being male sterile individuals; using the male sterility line to hybridize with the retainer line to produce male sterility line parent scallops, and using the male sterility line parent scallop produce Argopecten irradians irradians and Argopecten purpuratus hybrid scallop commercial fry. The method has the advantages that the scallop retainer line is built in animals for the first time, and the barrier of self-fertilization of the hermaphrodite scallops during hybridization is overcome effectively.

Description

technical field [0001] The invention belongs to shellfish breeding technology-a method for cultivating commercial hybrid scallop seedlings, and in particular relates to the construction and application of a maintainer line of Haizi hybrid scallop (the hybrid offspring of bay scallop ova and purple scallop sperm). Background technique [0002] The bay scallop (Argopecten irradians irradians) is native to the Atlantic coast of the United States and was introduced to my country in 1982. The bay scallop grows fast, has a wide range of temperature adaptability, and has strong stress resistance. It is very suitable for farming in the northern seas of my country. At present, the output and farming area account for more than 50% of the scallop farming in my country. However, due to the long-term inbreeding after the introduction, the germplasm of bay scallops has been seriously degraded during the breeding process. The size of commercial shellfish is getting smaller and smaller, 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 王春德马斌孙奎府赵玉明刘博周顺王文琪赵侠苗国英
Owner QINGDAO AGRI UNIV
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