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Direct-seeding seed production method for two-line system hybrid rice

A hybrid rice and hybrid technology, which is applied in the agricultural field, can solve the problems of low purity of hybrid seeds, low seed production yield, low production efficiency, etc., and achieves good seed production and breeding safety and strong smut resistance ability. , the effect of high production efficiency

Inactive Publication Date: 2016-07-13
HUNAN RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the methods in the above-mentioned prior art, the present invention provides a two-line hybrid rice direct-seeding seed production method, which overcomes the problems that the female parent is prone to lodging, the yield of seed production is not high, the difficulty of removing impurities is large, and the purity of hybrid seeds is not high. , low production efficiency and high cost

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (taking the seed production method of the variety Jiuliangyou Huanghuazhan as an example)

[0025] Jiuliangyou Huanghuazhan is a new two-line hybrid rice combination bred by the female parent 33S of the Hunan Rice Research Institute and the conventional rice variety Huanghuazhan bred in Guangdong Province.

[0026] The direct-seeding seed production method described in Example 1 includes the steps of sowing, field management, miscellaneous prevention and purity preservation, and harvesting and storage.

[0027] The steps of sowing are:

[0028] A. Parental selection: Huang Huazhan was selected as the male parent, and the dual-purpose GMS line 33S was used as the female parent.

[0029] The male parent, Huanghuazhan, is the conventional rice variety that has been promoted the most in the country this year. It is high-yielding and resistant to lodging, and is suitable for direct seeding. It has been planted in large areas in Hunan, Jiangxi and other places. ...

Embodiment 2

[0051] Embodiment 2 (taking the seed production method of variety Tao Youxiangzhan as an example)

[0052] Taoyouxiangzhan is a new hybrid rice combination of Taonong 1A used by the Agricultural Science Institute of Taoyuan County, Hunan Province, and Huanghuazhan, a conventional rice variety bred in Guangdong Province. It passed the variety approval of Hunan Province in 2015 (Xiangshendao 2015033).

[0053] The direct seeding seed production method described in embodiment 2 includes the steps of sowing, field management, miscellaneous prevention and purity preservation, and harvesting and storage.

[0054] The steps of sowing are:

[0055] A. Parental selection: Huang Huazhan was selected as the male parent, and the three-line male sterile line Taonong 1A was selected as the female parent.

[0056] The female parent, Taonong 1A, is a three-line male sterile line bred by the Agricultural Science and Technology Institute of Taoyuan County, Hunan Province. The male sterile line...

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PUM

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Abstract

The invention discloses a direct-seeding seed production method for two-line system hybrid rice. The method comprises the steps of seeding, field management, purity assurance and harvesting storage, wherein the seeding step comprises the following sub-steps: selecting Huanghuazhan as a male parent, examining and approving a sterile line in promotion mix as a female parent; taking a large-area Huanghuazhan planting area as a seed production field before use; fixing the sowing time according to the sowing date of the male and female parents, and ensuring flower synchronization of the male and female parent; ensuring that the sowing plot width of the male parent is equal to the harvesting width of a harvester, the sowing plot width of the female parent is 1-2 times that of the harvesting width of the harvester, and the spacing between the male parent and the female parent is 40-60cm, so that the male and female parents are conveniently and respectively harvested with machine; and manually transplanting a line of male parents at the seedling age of 22-25 days of the male parent, wherein 2-3 rice seedlings are planted in each stump, the row spacing is 25-40cm, and the spacing between the male parent transplanting line and the direct seeding male parent is 20-30cm. According to the method disclosed by the invention, the problems that the female parent is susceptible to lodging, the seed production yield is low, the weeding difficulty is high, the purity of hybrid seeds is low, the production efficiency is low and the cost is high are solved.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a two-line hybrid rice direct-seeding seed production method. Background technique [0002] Hybrid rice direct-seeding seed production faces two major problems. One is that the direct-seeding female parent is prone to lodging after spraying "920" for pollination, resulting in difficulties in harvesting, yield reduction and ear buds; The heading date is inconsistent, and a large amount of manpower is required to remove impurities before flowering every day. If the removal of impurities is not timely, it is easy to cause pollination to affect the purity of hybrids, and even seed production failure. [0003] In addition, simplicity, high efficiency and mechanization are the development direction of hybrid rice seed production in the future. At present, the light, simple and efficient seed production of hybrid rice in my country is mainly based on the parent machine transplant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01G16/00A01G22/22
CPCA01H1/02
Inventor 余应弘汤国华谢红军朱明东符慧荣肖燕凌春强
Owner HUNAN RICE RES INST
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