Method for breeding varieties of silkworm without palea scales on wings of imago

A cultivating method and variety technology, applied in the field of cultivating adult wingless hairy silkworm varieties, can solve problems such as affecting the health of seed producers and surrounding people, difficulty in preventing and controlling microparticle diseases, and troubled silkworm seed production enterprises, etc. Hygienic, high-quality cocoon silk, good for control

Inactive Publication Date: 2007-12-26
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

For a long time, the harm of moth ash has plagued silkworm egg production enterprises, seriously affecting the health of seed producers and the surrounding peop

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  • Method for breeding varieties of silkworm without palea scales on wings of imago

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specific Embodiment approach

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Through genetic analysis, the lack of scales in the silkworm is a recessive trait, and only in the homozygous state of the gene does the lack of scales appear.

[0024] 1. The scaleless mutant in Bombyx mori is associated with a lack of scale precursor cell differentiation followed by excessive apoptosis. Dev Genes Evol, 216, 2006(11): 721-726)

[0025] 1. Source: The silkworm species collected and preserved from the Institute of Sericulture, Chinese Academy of Agricultural Sciences, and provided externally.

[0026] 2. Main characteristics (according to "China Silkworm Variety Chronicle" Agricultural Press, May 1987, silkworm variety characteristics and characteristics term description traits, hereinafter the same.): Chinese dimorphic four-drown variety; larvae have limited markings, females The silkworms are common spot silkworms, and the male silkworms are plain silkworms. The silkworms are thick and strong, eat mulb...

Embodiment 1

[0028](1) Crossbreed the silkworm Scaleless P33 as the parent (female or male parent) and the production variety as the other parent (father or female parent) to obtain the first generation of hybrid F1; (2) use the production silkworm variety "Furong "(publicly known and public, see references: Feng Jiaxin editor-in-chief, Silkworm Breeding Anthology, Zhejiang University Press, September 2002: 544-548) carries out backcrossing and obtains BC1; P33 was used as the test cross parent, and the egg circle corresponding to the scurvy moth was selected for rearing, and then backcrossed with hibiscus to obtain BC2. By analogy, the steps of backcrossing and testcrossing were repeated, and after 4-6 generations of backcrossing of the silkworm variety "Furong", adult wings without scales were obtained, and other economic traits such as total cocoon quantity, cocoon layer ratio, cocoon silk length, The silk length, unwinding rate and cleanliness reach the level of the reincarnation paren...

Embodiment 2

[0044] (1) Using the silkworm Scaleless P33 as the parent (female or male parent) to cross with the production silkworm variety "7532" (father or female parent) to obtain the first generation of hybrid F1; (2) using the same production silkworm variety "7532" 7532” [commonly known and public, see reference: Feng Shulun. Breeding of Silkworm Summer and Autumn Variety 75 New × 7532, Jiangsu Sericulture, 1985 (3): 1-5] to obtain BC1 by backcrossing; (3) using moth area (egg Circle) half division method, use P33 as the test cross parent to carry out test cross, select the oviposites corresponding to Lepidoptera moths to breed, and then use "7532" backcross to obtain BC2. By analogy, repeat the steps of backcrossing and testcrossing. After 4-6 consecutive generations of backcrossing of the silkworm variety "7532" for production, the trait of no scales and hairs can be obtained, and other economic traits such as total cocoon quantity, cocoon layer rate, and cocoon silk length can be ...

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Abstract

The present invention relates to a method for breeding silkworm variety whose imaginal ala has no paraphyllium. Said breeding method includes the following several steps: parental selection, hybridization, backcross, test cross, continuous subculture and selfing so as to obtain two silkworm varieties whose imaginal ala has no paraphyllium.

Description

technical field [0001] The invention relates to a method for cultivating an adult wingless silkworm variety, belonging to the field of cultivating and utilizing fine varieties of crops. It is specially used for the cultivation of silkworm varieties with high-quality cocoon silk and clean seed production. Background technique [0002] Sericulture and silk reeling is a great invention in ancient my country with a history of more than 5,000 years. The world-famous Chinese silk is a bright pearl in the long history and culture of our country, and has made important contributions to the promotion of Chinese culture and the development of the national economy. Since the founding of New China, silk products have always been one of the few products that our country can dominate the international market. At present, the silk industry is still the most distinctive traditional advantageous industry in my country. The output of silkworm cocoons and raw silk in China ranks first in the...

Claims

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Application Information

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IPC IPC(8): A01K67/04
Inventor 沈兴家张志芳赵巧玲唐顺明易咏竹何家禄
Owner JIANGSU UNIV OF SCI & TECH
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