Method for securing purity of seeds for rice by bilinear hybridization

A hybrid rice and seed technology, which is applied in botany equipment and methods, rice cultivation, plant genetic improvement, etc., can solve the hidden dangers of seed production purity, and achieve the effects of ensuring seed production purity, improving seed purity, and reducing risks

Inactive Publication Date: 2004-10-20
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method to ensure the purity of seed production in view of the hidden problems caused by continuous abnormal low temperature during the fertility sensitive period in the existing two-line hybrid rice production process, using irrigation water Improve the microclimate of the farmland and increase the temperature of the seeding field to ensure the purity of the seeds

Method used

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Effect test

Embodiment 1

[0011] On August 13 and 14, 2003, Nanjing suffered from low temperature, with a daily average temperature of 21.3°C and a minimum temperature of 19°C. Jiangsu Academy of Agricultural Sciences has a 3-mu two-line method hybrid rice new combination seeding field (10 new combinations of low-temperature-sensitive male sterile line seed production with a fertility transition temperature below 24°C) and the female parent is 12-15 days before ear emergence. At this time, the field temperature at night is only 19°C, which will affect the purity of the two-line hybrid rice seed production. The reservoir water temperature for irrigation is 27-28°C. Using the method of this patent, the series irrigation is carried out with water from the reservoir, the water temperature at the water inlet is 27°C, and the water temperature at the water outlet is 26°C. After the temperature rises during the day, the field water is drained. Use this method for 3 consecutive days until the daily average t...

Embodiment 2

[0013] The Liangyoupeijiu large-area seed production base of the applicant unit sowed the female parent Pei'ai 64S on June 1, and transplanted it on June 20-25. In 2002, the low temperature in midsummer in Jiangsu area (8 / 13-17 for 5 consecutive days, with an average daily temperature of 22.3-23.5°C). At this time, the female parent is just 7-10 days before ear emergence. Use deep water irrigation of more than 10 cm, the temperature of the river water is 26-28 °C, the water temperature of the water inlet is 26-27 °C, and the water temperature of the water outlet is 24-25 °C. Use this method continuously for 3-5 days until the daily average temperature is higher than 23.5 ℃, drain the field water. As a result, the female parent of the planting field produced ears on August 20-27, and the parents met at the flowering stage, and the yield of the seed production was mostly 180-200 kg. In all seed production fields adopting the method, the seed purity can be 5-15% higher than tha...

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Abstract

A method for ensuring the purity of seeds in preparing the rice seed by two-line hybridization features that when the average temp per day is lower than 23.5 deg.C during 5-15 days before the female parent is in the ear, the water at the temp higher than 25 deg.C is used for deep irrigation for improving the small-area weather in field, and when said average temp is raised to 23.5 deg.C, the water is drained.

Description

technical field [0001] The invention relates to a method for ensuring seed purity in two-line hybrid rice seed production, which is suitable for two-line hybrid rice seed production with a sterile line fertility transition temperature below 24°C. Background technique [0002] my country's two-line hybrid rice research has achieved world-leading theoretical and practical results. By 2003, the cumulative planting area had exceeded 5 million hectares 2 . The research on super hybrid rice using the two-line method as a technical approach has also achieved breakthrough results. The two-line super rice Liangyoupeijiu bred by the applicant unit was the first in China to achieve the first phase of China’s super rice breeding goal, and was awarded the 2000 my country’s Science and Technology Progress The top ten news. According to incomplete statistics, the combination has planted 3.5 million hm 2 , is the two-line hybrid rice with the largest planting area at home and abroad. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01H1/02
Inventor 邹江石吕川根姚克敏宗寿余孙永华漆庆明吴令誉张伟徐其荣
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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