Rice multi-generation breeding method

A rice seed and rice technology, applied in the field of breeding, can solve the problems of long rice breeding cycle, shorten the rice growth period, etc., achieve the effect of speeding up the breeding process, shortening the breeding process, and solving the long breeding cycle

CN104855269BInactive Publication Date: 2017-03-29ZHEJIANG JIAXING AGRI SCI ACADEMY INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-03-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for breeding multiple generations of paddy rice in one year. The method comprises the following steps: taking paddy rice seeds, breaking dormancy, accelerating germination and then carrying out direct seeding; after paddy rice enters a flowering stage, carrying out glume cutting, emasculation and pollination on a female parent; selecting seed-grain or brown rice matured at earliest time as a next-generation parent in a filling and ripening stage; and repeating the previous three steps until multiple generations of the paddy rice are obtained. According to the invention, the method employs breeding and cultivation manners like direct seeding culture, glume cutting and emasculation, germination acceleration and seeding of brown rice, and rapid dormancy breaking and germination acceleration via seed soaking with a nitric acid solution, so the whole growth period of paddy rice is shortened; and thus, breeding process is shortened, breeding of multiple generations of paddy rice in one year is realized, and the problem of a long breeding period in the prior art is overcome.
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Description

technical field

[0001] The invention relates to the technical field of breeding, in particular to a multi-generation rice breeding method per year. Background technique

[0002] Rice is one of the main food crops in the world. Its yield and quality have a profound impact on the supply of international food and the improvement of people's living standards. Rice is an annual temperature-loving short-day crop, suitable for growth and reproduction in low-latitude areas with high temperatures or in seasons with high temperatures. Low temperature slows growth and development, and higher temperature accelerates growth and development. In addition to temperature, the length of rice growth period is mainly restricted by the length of light. When rice has a certain amount of vegetative growth, if it is in a short day In the photoperiod, the growth is accelerated and the heading is accelerated, on the contrary, if it is in a photoperiod with longer sunshine, the growth is slow and the...

Examples

Embodiment 1 1

[0028] Embodiment 1 Five generations of breeding in one year

[0029] 1. Experimental location: the experimental field of Jiaxing Academy of Agricultural Sciences and Nanling Breeding Base, Yelin Town, Lingshui County, Hainan

[0030] 2. Experimental materials: naked late japonica rice Jia 64 (female parent), early-maturing late japonica non-light-leaved variety Jia 33 (male parent)

[0031] 3. Sowing date: the first season: sowing on May 25, 2009 (the first season was in Jiaxing, the rest in Hainan); the second season: sowing on September 22, 2009; the third season: November 26, 2009 Sowing; fourth season: sowing on February 23, 2010; fifth season: sowing in early May, 2010.

[0032] 4. Breeding methods

[0033] (1) Take the rice parent seeds, soak them in nitric acid aqueous solution for 58 hours, completely eliminate the dormancy of the seeds, rinse them with water for 3 to 5 times, put them in a constant temperature box at 30°C to accelerate germination, until 80% of the...

Embodiment 2 1

[0047] Embodiment 2 Breeding for four generations a year

[0048] 1. Experimental location: the experimental field of Jiaxing Academy of Agricultural Sciences and Nanling Breeding Base, Yelin Town, Lingshui County, Hainan

[0049] 2. Experimental materials: naked late japonica rice Jia 0664 (male parent), early-maturing late japonica variety Jia 33 (female parent)

[0050] 3. Sowing date: Season 1: Sowing in Hainan in early October 2006; Season 2: Sowing in Hainan on December 30, 2006; Season 3: Sowing in Hainan on March 20, 2007; Season 4: June 2007 Sowing in Jiaxing on the 10th.

[0051] 4. Breeding methods

[0052] (1) Take the parent rice seeds, soak them in nitric acid aqueous solution for 60 hours, completely eliminate the dormancy of the seeds, rinse them with water for 3 to 5 times, put them in a constant temperature box at 30°C to accelerate germination, until 80% of the seeds are broken. , to broadcast live.

[0053] The preparation method of the nitric acid aque...

Embodiment 3 1

[0062] Example 3 Three generations of breeding in one year

[0063] 1. Experimental location: the experimental field of Jiaxing Academy of Agricultural Sciences and Nanling Breeding Base, Yelin Town, Lingshui County, Hainan

[0064] 2. Experimental materials: high-quality late japonica rice variety Jia 991 (female parent), dwarf japonica line with large spikes and high yield single test 56 (male parent)

[0065] 3. Sowing date: hybridization in Jiaxing in autumn 1999, Hainan F in October 1999 1 Seeding, December 1999 Hainan F 2 Seeding, Jiaxing F, May 2000 3 Seeding, October 2000 Hainan F 4 Seeding, December 2000 Hainan F 5 Seeding, Jiaxing F, May 2001 6 Sowing, basically finalizing.

[0066] 4. Breeding methods

[0067] (1) Take the rice parent seeds, soak them in nitric acid aqueous solution for 58 hours, completely eliminate the dormancy of the seeds, rinse them with water for 3 to 5 times, put them in a constant temperature box at 30°C to accelerate germination, unt...