Hybrid rice mixed sowing seed production technology performed according to male and female parent grain shape difference

A hybrid rice and hybrid rice technology, which is applied in the field of japonica hybrid rice seed production, can solve the problems of dampening the enthusiasm of rice farmers, increasing the selling price of hybrid rice seeds, increasing farmers' rice planting costs, and the like, so as to simplify the separate harvesting process and simplify the sowing process. planting effect

Inactive Publication Date: 2016-05-04
国家粳稻工程技术研究中心 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0002] The production potential of hybrid rice is recognized worldwide, but in economically developed countries, it has not been used in such a large area as our country. One of the most restrictive factors is that it is difficult to produce a large number of hybrid seeds.
Because the seed production of hybrid rice in my country mostly relies on manual operations, the process is complicated, and it is technology integration and labor-intensive work, which is difficult to apply to countries with developed economies and high degrees of mechanization.
In my country, hybrid rice seed production technology has long been mature, but with the rapid development of the rural economy, the labor force continues to appreciate, resulting in the continuous increase in the cost of seed production and the price of hybrid rice seeds, thereby increasing the cost of farmers' rice planting and hurting the enthusiasm of rice farmers

Method used

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Embodiment Construction

[0009] Below in conjunction with embodiment the present invention is further described.

[0010] (1) First of all, the traditional method of artificial emasculation hybrid breeding was adopted, and the small-grain variety C122 with a thousand-grain weight of 14.8 g was first crossed with the rice restorer line R5, and a new stable restorer line variety R15 with a thousand-grain weight of 15 g and small grains containing restorer genes was bred.

[0011] (2) The large-grain male sterile line A8 with a thousand-grain weight of 27 g and a similar sowing period was selected for mating, and a strong dominant combination Longyou 815 was screened out.

[0012] (3) Simplify the sowing and transplanting procedures, adopt the one-time mixed direct seeding of parents, and the weight ratio of parents is 2:6. The flowering period is dominated by wind pollination, supplemented by mechanical pollination.

[0013] (4) When the parents are mature, the harvester mixes the parents, and the seed...

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Abstract

The invention belongs to the technical field of japonica hybrid rice seed production, namely, a seed production technology of mixed sowing and mixed harvesting of BT type large-grain three-line nucleo-cytoplasmic interaction sterile lines and restoring lines with restoring genes. Firstly, small-grain varieties with the thousand kernel weight smaller than or equal to 15 g are directionally transformed into small-grain sterile lines or restoring lines with the thousand kernel weight smaller than or equal to 15 g through a traditional manual emasculation cross breeding method; secondly, medium-and-large-grain sterile lines or restoring lines with the thousand kernel weight larger than 25 g are selected to be matched with the small-grain sterile lines or the restoring lines with the thousand kernel weight smaller than or equal to 15 g, it is required that the sowing beginning duration period of the medium-and-large-grain sterile lines or the restoring lines is close to that of the small-grain sterile lines or the restoring lines newly transformed in the first step, and high-advantage combinations are screened from the matched sets; thirdly, when hybrid seeds are produced, male and female parent one-time hybrid direct sowing is performed, or after male parents and female parents are mixed and sown according to a certain proportion, transplantation, or seedling slinging, or mechanical transplanting or mixed harvesting is performed, grains pass a certain-hole-diameter sieve after harvesting, large-grain varieties are left in the sieve, and small-grain varieties pass the sieve.

Description

[0001] The invention belongs to the technical field of japonica hybrid rice seed production. That is, a BT-type large-grain three-line nuclear-cytoplasmic interaction sterile line and a restorer line with a restorer gene are mixed and harvested. Background technique [0002] The yield increasing potential of hybrid rice is recognized in the world, but one of the most important restrictive factors is that it is difficult to produce a large number of hybrid seeds in economically developed countries like our country. Because the seed production of hybrid rice in my country mostly relies on manual operations, the process is complicated, and it is technology integration and labor-intensive work, which is difficult to apply to countries with developed economies and high degrees of mechanization. In my country, hybrid rice seed production technology has long been mature, but with the rapid development of the rural economy, the labor force continues to appreciate, resulting in the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 刘桂林李志彬朱崴刘欣章莹亓娜
Owner 国家粳稻工程技术研究中心
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