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Breeding method of clustered spikelet early indica rice

An early indica rice and clustering technology is applied in the breeding field of cluster ear early indica rice, which can solve the problems of narrow genetic basis, early rice breeding work yield, and difficulty in making greater breakthroughs in cultivar traits, and achieves improved plant traits, improved light receiving attitude and Ventilation and breathable conditions, the effect of enhancing lodging resistance

Inactive Publication Date: 2017-03-29
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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Problems solved by technology

[0003] Due to the frequent exchange of technical cooperation and breeding materials between various domestic rice breeding units, the early indica rice varieties bred in recent years have relatively close genetic relationship and narrow genetic basis, so that the early rice breeding work is limited in terms of yield and variety traits. Difficult to have a bigger breakthrough

Method used

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  • Breeding method of clustered spikelet early indica rice

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Embodiment 1

[0026] A kind of breeding of early indica rice with 2 clusters of top spikelets, concrete steps are as follows:

[0027] In May of the first year's main season, the water tank is sown with the parent, and the conventional paddy rice (the rice mutant material selected and bred by the Zhejiang Academy of Agricultural Sciences can be purchased in the Zhejiang Academy of Agricultural Sciences.) to the top spikelets of 3 clusters. The male parent of the donor, the high-yield early indica rice Zhongjiazao 17 (the high-yield conventional early indica rice bred by the China Rice Research Institute, Zhejiang Shendao 2008022, can be purchased from the China Rice Research Institute.) as the recipient female parent, carried out sexual crossing, get seed F 1 .

[0028] In the winter of the first year, the seeds of F 1 Transplanting and planting for additional generations in winter to obtain plant F 1 ; In the spring of the second year, the hybrid F 2 After the seeds are mixed and plant...

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Abstract

The invention relates to the technical field of rice breeding and particularly relates to a breeding method of clustered spikelet early indica rice. According to the breeding method, conventional rice with clustered apical spikelet is used as a donor male parent and is sexually hybridized with conventional early indica rice, so that distant distance genes can be introduced into an excellent parent, the genetic distance of rice materials is expanded, and conditions are provided for distant hybrid vigor; a plurality of times of multi-crossing are carried out, so that hybrid progenies have abundant hereditary basis and target properties of the early indica rice can be rapidly stabilized on the basis of keeping fasciation properties; and the fasciation properties are introduced, so that the grains per ear, the ear length, the grain density per ear and the plant length of the early indica rice can be effectively improved, furthermore, the plant properties are improved, the lodging resistance is enhanced, the light receiving postures of plants and ventilation conditions are improved, plant diseases and insect pests are reduced, and the aims of improving the yield and quality of rice are realized.

Description

technical field [0001] The invention relates to the technical field of rice breeding, in particular to a method for breeding clustered early indica rice. Background technique [0002] Early rice is an important part of rice production. Early rice is edible, storage-resistant, and also has the characteristics of multiple uses such as industry and feed. Stabilizing and developing early rice production can not only increase total grain output, but also stabilize double-crop late rice production, which is of great significance to ensuring food security and economic development. [0003] Due to the frequent exchange of technical cooperation and breeding materials between various domestic rice breeding units, the early indica rice varieties bred in recent years have relatively close genetic relationship and narrow genetic basis, so that the early rice breeding work is limited in terms of yield and variety traits. It is difficult to have a bigger breakthrough. Therefore, in the ...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 俞法明严文潮金庆生张小明叶胜海翟荣荣朱国富
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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