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Breeding method of alien substitution line

A technology of heterogeneous substitution and conventional method, applied in the direction of botanical equipment and methods, application, plant gene improvement, etc., can solve the problems of susceptibility to disease, poor yield, etc.

Inactive Publication Date: 2010-06-30
李祥
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Problems solved by technology

Moreover, most of the transmutation lines selected and bred are based on the background of Chinese spring. Due to the weaknesses of Chinese spring itself (such as poor yield, susceptibility to diseases, late heat, soft stalks, etc.), the application of heterogeneous substitution lines is difficult. Big limitations

Method used

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Embodiment Construction

[0011] Conventional method: The conventional method is a common way of breeding wheat heterosubstitution lines, that is, direct selection among the hybrid progenies of wheat and related plants. In distant hybridization, if the parental chromosomes are similar in certain structures or functions, spontaneous chromosome substitution may occur during meiosis.

[0012] Monomer substitution method: the procedure is: first cross the monomer of the recipient variety with the corresponding disomy addition line, and then in the hybrid F 1 The self-crossing of the double-somotic plants is selected, and then the heterosubstitution line is selected among the self-crossed progeny of the double-somic plants. This method has the disadvantages of heavy cytological workload, long time required, and the need to breed additional lines. Yang Wuyun et al. (1997) improved the monomer substitution method, and used the bridge monomer method to carry ph 1b Gene's C.S.ph 1b The 5B chromosome of the l...

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Abstract

The invention relates to a breeding method of an alien substitution line, which can be used for further shifting exogenous beneficial genes to wheat by utilizing a wheat alien substitution line so that an alien translocation line is bred. The alien substitution line has the very important function at the aspects of gene mapping of wheat sibling species, researches on the hereditary feature of an exogenous chromosome in the background of wheat and the evolutionary relationship between the wheat and the sibling species thereof and the like, and a wheat variety with abundant hereditary basis and excellent comprehensive character is selected as a receptor material for breeding the alien substitution line so that the utilization value of the alien substitution line can be enhanced. In addition, a technology system for conveniently and rapidly breeding the alien substitution line is established and also is one of important research subject for enhancing the breeding efficiency of the alien substitution line.

Description

technical field [0001] The breeding method of heterosubstitution lines belongs to the field of crop genetic improvement. Background technique [0002] As of the early 1990s, wheat genetics and breeders at home and abroad had obtained common wheat and rye, goatgrass, echinacea (Triticum genus), barley, trichomes, Miscanthes, Lai There are more than 220 heterosubstitution lines in the genus Grass (Li Zhensheng, 1987; Zhong Guanchang et al., 2002). In the past 10 years, with the wide application of tissue culture, molecular markers and other techniques, new progress has been made in the creation of heterosubstitution lines. According to incomplete statistics (Li Zhanwei, 2004), domestic and foreign newly obtained common wheat and rye, goatgrass, three-headed wheatgrass, tufted wheat, limpet, dry wheatgrass, Huashan new wheatgrass, elymus, echinacea, etc. There are more than 60 heterogeneous materials, including genes for resistance to stripe rust and powdery mildew of rye, ge...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H1/02
Inventor 李祥
Owner 李祥
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