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Method for producing core seeds of thermosensitive genic male sterile line of rice by using 'three-layer ear method'

A temperature-sensitive sterile line and core seed technology, applied in the agricultural field, can solve the problems of limited production of core seeds, high construction and use costs, and high cost of core seeds, so as to achieve expanded quantity, large core seeds, and avoid unnecessary The effect of education

Inactive Publication Date: 2012-01-11
HUNAN LONGPING SEED IND
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Problems solved by technology

[0007] However, this method has a high cost of processing and producing core seeds in an artificial climate chamber (artificial climate construction costs and use costs are high), and the production of core seeds is also limited. As more rice photothermosensitive male sterile lines are applied to production, As well as the increasing promotion area of ​​two-line hybrid rice, there is a need for a low-cost, high-yield, and easier-to-operate method to produce the required CMS core seeds

Method used

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  • Method for producing core seeds of thermosensitive genic male sterile line of rice by using 'three-layer ear method'

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Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1 P88S core seed and original seed production

[0029] In 2005, the P88S seeds provided by the breeding experts of Hunan Hybrid Rice Research Center were used as the seeds for the selection nursery.

[0030] The production base is selected in a rice field with a water temperature of 18-20°C, enough cold water to irrigate, easy access to water, and consistent fertility.

[0031] The seed selection nursery is sown in early May, and the seedlings are raised in moist water. The seedling rate is 25kg / mu, and the seedlings are sown evenly and densely. The seedling age is about 25 days, that is, when the seedlings have about 6.5 leaves, the seedlings with 0 to 1 tiller are selected for planting. , density 20×27cm, plant 1000 plants. Before transplanting, apply 45% compound fertilizer (N:P:K=15%:15%:15%) 30kg+urea 5kg per mu in the selected nursery field; after the first tillering of 2 tillers in the field, immediately re-dry the field for 8 days Seedling control, ...

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Abstract

The invention provides a method for producing the core seeds of a thermosensitive genic male sterile line of rice by using a 'three-layer ear method', which comprises the steps of seed selection nursery, 'three-layer ear' rice culture, standard strain selection, cold-water constant-temperature deep irrigation, core strain selection and core seed production. The invention also comprises the production of elite seeds by using the core seeds and the use of the elite seeds passing planting tests, artificial climatic chamber tests and heterosis tests as seeds for reproduction. The method of the invention has the advantages of low cost, simple process and high seed yield.

Description

technical field [0001] The invention belongs to the field of agricultural technology, and relates to a crop seed production technology, in particular to a method for producing core seeds of rice temperature-sensitive sterile lines. Background technique [0002] Since the two-line hybrid rice research was basically successful in 1995, the planting area of ​​two-line hybrid rice in my country has expanded year by year, and various types of rice light-temperature-sensitive sterile lines and two-line hybrid rice combinations have been bred to adapt to different rice varieties. According to the needs of planting in the cropping area, the two-line combination showed a higher yield-increasing advantage and rice quality than the three-line combination. [0003] The two-line method hybrid rice is realized by cultivating rice photothermosensitive male sterile line with the rice photothermosensitive genic male sterile gene as a genetic tool. [0004] Photothermosensitive genic male ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/04A01G22/22
Inventor 刘爱民肖层林龙和平李小华
Owner HUNAN LONGPING SEED IND
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