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Multicomponent cross breeding method of selection and breeding of silkworm

A cross-breeding, multi-variety technology, applied in animal husbandry, etc., to achieve the effect of ensuring hybridization rate, fast development, and strong resistance

Inactive Publication Date: 2008-01-23
GUIZHOU SERICULTURE RES INST GUIZHOU PEPPER RES INST
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Problems solved by technology

But this method only discloses the binary hybridization breeding method, in the binary hybridization breeding method, the binary species and the multiple species do not need to test the combining ability of the original species of the same line in the multiple species

Method used

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Embodiment Construction

[0019] The four purebreds of Guican No. 3, a multi-variety hybrid, were used as the main materials. The original materials have good combining ability, so that the success rate of molecular marker-assisted breeding of excellent new silkworm varieties is high. The specific steps are as follows:

[0020] (1) The black moth carrying the black moth morphological marker gene Bm is crossed with the white Guican 3 57A variety to obtain F1 hybrid moths. Bm is dominant relative to the Guican 3 57A variety, so the F1 hybrid moths are all black silk moth;

[0021] (2) Use the F1 hybrid moth to continuously backcross 57A variety Guican No. 3 for 10 times. When the genetic contribution rate of the black silk moth is less than 1 / 10,000, the obtained black hybrid moth has stable black moth morphological markers, and at the same time It also has the excellent performance of multiple hybrid purebred Guican No. 3 57A variety;

[0022] (3) According to steps (1) and (2), carry out hybridization...

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Abstract

The invention provides a multivariate cross breeding method for selecting and breeding silkworms. Crossbreed the black silkworm moths attached with Bm with the white multivariate cross purebred silkworm moths and then backcross continuously to achieve multivariate cross purebred silkworm moths attached with stable Bm; then crossbreed the multivariate cross purebred silkworm moths of different breeds to acquire the black silkworm moth protospecies; next, crossbreed the black silkworm moth protospecies with the white duality cross purebred silkworm moths, thus obtaining the utility breed of multivariate cross purebred silkworms. During propagating the cross breeds, the invention, due to the crossbreed is performed with one black and one white silkworm moth, can well prevent the pair silkworm moths with the same color appearing, thus ensuring the hybridization rate and cultivating finally with utility multivariate cross breeds attached with Bm and multivariate ancestry and features speedy growth and good fastness as well as additionally ensuring the high hybridization rate for preparing breeds technically and enhancing the quality of the silkworm breeds.

Description

technical field [0001] The invention relates to a silkworm breeding method, in particular to a multiple hybridization breeding method for assisting silkworm breeding by using the black moth shape as a marker. Background technique [0002] The black moth is a molecular marker breeding material with a genotype of Bm, which is a basic material with multi-difference lineage, fast development and strong resistance. Using it for molecular marker breeding can not only obtain purebred multivariate hybrids with black moth markers, but also breed purebred multivariate hybrids with multivariate bloodlines, fast development, and strong resistance, and finally breed with There are black moth marks and multi-variety hybrids with multivariate bloodlines, fast growth and strong resistance. [0003] At present, the breeding of silkworm varieties usually adopts hybridization technology, which can introduce specific genes of one variety into another variety, so that the comprehensive economic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/04
Inventor 罗朝斌代方银姜虹
Owner GUIZHOU SERICULTURE RES INST GUIZHOU PEPPER RES INST
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