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A mechanized seed production method for a new combination of hybrid rice

A hybrid rice and new combination technology, applied in the fields of botanical equipment and methods, plant genetic improvement, application, etc., can solve the problems of cumbersome technology, low utilization rate of mechanization, restricting the production and application of hybrid rice varieties, and avoid technical problems. Effect

Active Publication Date: 2019-09-03
CHONGQING ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of artificial seed production remains high. With the promotion of light and simplified technologies such as direct seeding, the amount of rice seedlings used for seedlings has increased significantly. The high price of hybrids caused by high-cost seed production has seriously restricted the production and application of hybrid rice varieties.
Due to the complexity of hybrid rice seed production procedures and the low application level of mechanized seed production in rice breeding, it also greatly restricts rice seed production and increases the cost of rice seed production
[0005] The prior art has problems such as high failure rate at flowering stage, low yield of seed production, low utilization rate of mechanization, and high cost of seed production. The CMS line has a short growth period, while the restorer line has a long growth period. It is difficult to adjust the flowering period by sowing and transplanting at different periods. At the same time, because the parents are sowing and transplanting at different periods, and the restorer line is generally transplanted in 2-3 periods. , technically cumbersome, not conducive to the application and promotion of mechanized seed production

Method used

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  • A mechanized seed production method for a new combination of hybrid rice
  • A mechanized seed production method for a new combination of hybrid rice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Mechanized Breeding Process of Shen 08S / Yuhui 2103 Hybrid Rice

[0023] Selection of breeding base: location: Yongchuan, Chongqing; area: 2 mu

[0024] Schedule:

[0025] The male parent is sown on April 1st, seedling age: 30 days, transplanted when 4-5 leaves;

[0026] The female parent is sown on April 1st, seedling age: 30 days, transplanting when 4-5 leaves;

[0027] The ear starts on July 12, pollination occurs on July 12-17, the male parent is harvested on July 18, and the female parent is harvested on August 8.

[0028] 1.1 Cultivation of rice parents with consistent sowing and pumping periods

[0029] By setting up multi-point experiments on hybrid rice parents (restorer line Yuhui 2103 and sterile line Shen 08S) at the sowing and pumping period, under the same cultivation environment, the intermediate materials of the rice male sterile line and the restorer line with the same sowing and pumping period were selected to ensure Under the same conditi...

Embodiment 2

[0041] Example 2 General Mechanized Breeding Process of Shen 08S / Yuhui 2103 Hybrid Rice

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Abstract

The invention discloses an efficient mechanized seed production method for a novel hybrid rice combination. The efficient mechanized seed production method comprises the following steps: cultivation of rice parents with a consistent heading date; screening of novel excellent hybrid combinations; cultivation of seedlings with slime in trays and mechanized transplanting; seed production and field management; measures for keeping purity; and mechanized seed harvesting. Compared with the prior art, the efficient mechanized seed production method disclosed by the invention can achieve the synchronization of flowering stages of a sterile line and a restoring line by seeding in the same period, and avoids the technical problem of adjusting the synchronization of the flowering stages.

Description

technical field [0001] The invention belongs to the field of crop breeding, and in particular relates to a high-efficiency mechanized seed production method of a new combination of hybrid rice. Background technique [0002] The industrial application of hybrid rice has made great contributions to solving the problems of China's food self-sufficiency and world food security. It promoted the second green revolution and played a major role in promoting the food security of China and the world. With the transformation of China's economy and changes in production conditions such as labor costs, the cost of hybrid rice seed production has also become a restrictive factor for the development of hybrid rice. [0003] The failure of flowering period is the main factor restricting the production of hybrid rice seeds. Due to the failure of flowering period, the production of hybrid rice seed production has been greatly reduced or even failed. On the one hand, it has directly led to a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02
Inventor 张现伟李经勇唐永群王春萍肖人鹏王虹李超明甘兴友
Owner CHONGQING ACAD OF AGRI SCI
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