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Method of rice photoperiod insensitive variety breeding

A photoperiodic and insensitive technology, applied in the fields of botanical equipment and methods, plant genetic improvement, and application, can solve the problems of polluted rice heading and delay, and achieve high breeding efficiency, good stability, and strong pertinence.

Inactive Publication Date: 2020-06-12
江西省超级水稻研究发展中心
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the object of the present invention is to provide a method for breeding rice photoperiod insensitive varieties, to breed rice varieties suitable for planting under long-light conditions, and effectively solve the problem of rice heading delay caused by light pollution

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0016] The photoperiod-sensitive japonica rice variety Nanjing 5055 and the photoperiod-insensitive indica rice Ganxiangzhan No. 1 involved in this experiment were collected from the germplasm resource bank of the Rice Research Institute of Jiangxi Academy of Agricultural Sciences.

[0017] Jiangxi Academy of Agricultural Sciences' rice Nanchang test field is next to a national road, and one side of the test field is under the illumination of street lights, causing light pollution to the growth of rice. In 2015, Nanjing 5055 and Ganxiangzhan No. 1 were planted in two seasons and two nights, and transplanted to fields under light pollution (under street lights) and normal conditions respectively. It was observed that Ganxiangzhan No. 1 headed under the two environments However, Nanjing 5055 can head ear under normal conditions, but it can't ear ear under light pollution conditions, indicating that it is a very sensitive variety to photoperiod.

[0018] Cross Nanjing 5055 and Ga...

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Abstract

The invention discloses a method of rice photoperiod insensitive variety breeding. Rice materials are respectively planted under a normal condition and a light pollution condition, and the growth periods of the rice materials under the two environment conditions are compared; photoperiod insensitive resources are screened, and varieties with excellent agronomic characters are utilized to hybridizeor backcross and self-cross with photoperiod insensitive materials; and planting and screening are carried out under the light pollution condition, planting is simultaneously performed under the twoconditions after phenotype is stabilized, and the successful breeding of the photoperiod insensitive materials can be indicated when heading dates are the same. Through the method, rice varieties insensitive to light can be bred and well adapt light pollution environments.

Description

technical field [0001] The invention belongs to the field of physiological breeding, and in particular relates to a method for breeding rice photoperiod insensitive varieties. Background technique [0002] The conventional indica rice that has been widely promoted in many provinces and regions in the southern rice region of my country in the past 40 years, such as Guichao No. 2, Guangluai No. 4, Zhongjiazao 17, Huanghuazhan, etc., and the 10 most widely used sterile rice Lines: Zhenshan 97A, Wei 20A, Ⅱ-32A, Jin 23A, Gang 46A, Xieqingzao A, Bo A, Longtefu A, Pei'ai 64S, Zhong 9A, and the 10 most widely used restoration lines: Minghui 63, Ce 64-7, 93-11, IR26, Miryang 46, Gui 99, CDR22, IR24, Fuhui 838, Mianhui 725, the hybrid rice prepared by them all have one thing in common: they are not sensitive to light. Because the stronger the photosensitivity, the more unstable the growth period, and it is not suitable for large-scale promotion. Therefore, in breeding practice, photop...

Claims

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Application Information

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IPC IPC(8): A01H1/04A01H1/02
CPCA01H1/04A01H1/02
Inventor 严松聂元元雷建国毛凌华毛方明
Owner 江西省超级水稻研究发展中心