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Method for creating weakly-photosensitive and high-fertility oryza alta new germplasm

A wild rice and new germplasm technology, applied in botany equipment and methods, horticultural methods, plant regeneration, etc., can solve the problems of low fertility and low fertility of high-stalk wild rice, and achieve high seed setting rate and simple method Effect

Inactive Publication Date: 2019-03-01
SOUTH CHINA AGRI UNIV
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  • Description
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  • Application Information

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Problems solved by technology

The second is low fertility. The fertility of high-stalk wild rice is low, and the general seed setting rate is below 20%.

Method used

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  • Method for creating weakly-photosensitive and high-fertility oryza alta new germplasm
  • Method for creating weakly-photosensitive and high-fertility oryza alta new germplasm
  • Method for creating weakly-photosensitive and high-fertility oryza alta new germplasm

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation examples. The embodiments are only used to explain the description, and are not intended to limit the scope of the present invention. The test methods used in the following examples are conventional methods unless otherwise specified. The present invention is further described in conjunction with the following examples.

[0029] The method for the creation of new germplasm of weakly light-sensitive and high-fertility tall-stalk wild rice in this embodiment (the process is as follows: figure 1 shown), specifically include the following steps:

[0030] a. Radiation mutagenesis of mature seeds of O. sativa:

[0031] Mature seeds of tall-stalked wild rice (commonly known as Co 60 The radiation dose is usually below 300), plant the first generation of radiation and bag the seeds.

[0032] b. Irradiation and Screening of Weak Photosensi...

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Abstract

The invention is a method for creating weakly-photosensitive and high-fertility oryza alta new germplasm. The method comprises the following steps that through irradiation mutagenesis of a certain dose of gamma rays, oryza alta new germplasm is created, in the two radiation generations, through super-large group planting, a weakly-photosensitive mutant is selected, continuous selfing of twenty-onegenerations is conducted through the weakly-photosensitive mutant, weakly-photosensitive and high-fertility single plants are selected in each generation, and finally the weakly-photosensitive and high-fertility oryza alta new germplasm is obtained. The method is simple and easy to realize, the obtained oryza alta new germplasm has weak photosensitivity, normal flowering and heading can also be conducted in the early season with the long sunshine duration in the south, the oryza alta new germplasm further has the high fertility and the high ripening rate. Obtained materials specifically havefurther utilization value, and an important material source can be provided for development of rice polyploid breeding.

Description

technical field [0001] The invention relates to the technical field of rice polyploid breeding, and more specifically relates to a method for creating a new germplasm of wild rice with low light sensitivity and high fertility and high stalks. Background technique [0002] Tall wild rice is native to the tropical regions of South America and contains a large number of excellent genes such as resistance that cultivated rice does not have. It is a valuable resource for rice breeding. However, the two characteristics of tall wild rice are not conducive to the application of its favorable genes in rice breeding. [0003] One is strong photosensitivity. Tall-stalked wild rice is a short-day plant with strong photosensitivity. In the early season (June-August) with longer sunshine in the south, it generally cannot flower and head normally, and it needs to wait until the late season with shorter sunshine (10 -December) to normal flowering and earing. The second is low fertility. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/06A01H4/00
CPCA01H1/06A01H4/008
Inventor 张留声吴锦文曼达袁赟刘向东
Owner SOUTH CHINA AGRI UNIV
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