Method for selecting long-term domestic silkworm pupa new material by crossing domestic silkworms and wild silkworms

A long-term pupa and wild silkworm technology, applied in animal husbandry and other directions, can solve the problems of decreased silkworm cocoon unwinding rate, loss of fresh raw materials, and poor silk quality.

Inactive Publication Date: 2012-04-11
SICHUAN ACAD OF AGRI SCI SERICULTURE INST
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, while drying the cocoon at high temperature, on the one hand, the unwinding rate of the cocoon will decrease, and the

Method used

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  • Method for selecting long-term domestic silkworm pupa new material by crossing domestic silkworms and wild silkworms
  • Method for selecting long-term domestic silkworm pupa new material by crossing domestic silkworms and wild silkworms
  • Method for selecting long-term domestic silkworm pupa new material by crossing domestic silkworms and wild silkworms

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Experimental program
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Embodiment Construction

[0016] (1) Long-term pupal gene transfer from wild silkworm to silkworm

[0017] Wild silkworms were collected from abandoned mulberry gardens in Peng'an County, Sichuan Province, and raised indoors in a simulated field environment. Cuttings of mulberry branches with leaves were placed in flowerpots, and replaced every 2 days to keep the mulberry leaves from withering, and wild silkworms were placed on them. The outer cover is covered with an anti-insect net to prevent the damage of rats and insects and the escape of wild silkworms. The larvae of wild silkworm are slender and slender, with anthracite-gray body color and irregular markings; the cocoon is small, spindle-shaped, yellow-colored and thin-cocoon-layered; a male pupa emerges after 48 days of the pupal period, and the moth body is black-gray. The chrysalis of wild mulberry silkworm has a long pupal period, and there is no purebred silkworm to mate with it when it emerges. The female moth of the production species "871...

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Abstract

The invention discloses a method for selecting a long-term domestic silkworm pupa new material by crossing domestic silkworms and wild silkworms, which comprises the following steps: 1, transferring long-term pupa genes in wild silkworms into domestic silkworms; 2, integrating various excellent properties; 3, building a new strain; and 4, performing directional selection. The method can breed the new variety which has specific properties and special utilization values, develop new products for silkworm industry, exploit new consumption fields for the silkworm industry, deeply develop and comprehensive utilize resources of silkworm industry, extend industrial production chain and obtain high added value.

Description

technical field [0001] The invention belongs to the field of utilization of special gene resources, and specifically relates to a method for introducing a long-term pupa gene of wild silkworm into a conventional silkworm variety, quickly fixing and expressing it in the silkworm variety, and selecting a new long-term pupa strain of the silkworm. Background technique [0002] China is the birthplace and industrial center of sericulture in the world, and the sericulture industry is an outstanding contribution of the Chinese nation to mankind. The silkworm is the most important economic insect in the order Lepidoptera. Bombyx mori is domesticated from wild silkworm. Long-term artificial selection has greatly improved some economic traits of silkworm, but at the same time caused serious gene drift and lost many important genetic resources. my country has a vast territory, diverse climates, and a wide variety of wild silkworms, which contain valuable genetic resources, which are ...

Claims

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Application Information

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IPC IPC(8): A01K67/04
Inventor 杜周和刘俊凤陈义安刘彬斌张友洪张剑飞吴建梅左艳春胡光荣
Owner SICHUAN ACAD OF AGRI SCI SERICULTURE INST
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