Low-temperature sensitive sterile rice fertility conversion monitoring method

A fertility conversion, low temperature technology, applied in rice cultivation, botanical equipment and methods, plant genetic improvement, etc., can solve problems such as harming the purity of seed production, and achieve the effects of ensuring purity, improving purity, and reducing the risk of seed production.

Inactive Publication Date: 2006-08-09
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for monitoring the fertility conversion of low-temperature-sensitive sterile rice in view of the hidden problem that abnormal low temperature in the fertility-sensitive period will endanger the purity of seed production in the existing two-line method hybrid rice seed production process method, so as to adopt ecological measures such as "water temperature adjustment" to improve farmland microclimate, increase plant temperature, and provide technical support for stabilizing the purity of seed production

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] From August 18 to 20, 2005, Nanjing suffered from low temperature for three consecutive days. The average temperature measured by the Meteorological Observatory for the three days was 22.7°C, and the average minimum temperature was 21.1°C. Jiangsu Academy of Agricultural Sciences has 1 mu of two-line method hybrid rice new combination breeding field (a total of 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 5-10 days before ear emergence. sky. The PTWD-2A temperature sensor is used to automatically collect data with the data collector (TRM-ZS1 type), and the average temperature of the plant stems 20 cm from the ground calculated at 02:00, 08:00, 14:00, and 20:00 was 22.3°C on the 18th. , which is expected to affect the fertility and seed production purity of the male sterile line. From the afternoon of August 18th, water from the reservoir was used for 15cm ...

Embodiment 2

[0016] The applicant's 3-mu two-line method hybrid rice Liangyou 108 farming field is located in the rice test field of Jiangsu Academy of Agricultural Sciences. The female parent is the low-temperature-sensitive CMS line Pei'ai 64S, which was sown on June 1 and transplanted on June 25. In 2005, there was continuous low temperature in Nanjing area on August 18-20 (the average daily temperature was 21.5-23.5°C). At this time, the female parent was just 7 days before ear emergence. Adopt PTWD-2A type temperature sensor to automatically collect data with data collector (TRM-ZS1 type), measure the plant stem temperature 15 centimeters above the ground with 02:00, 08:00, 14:00, and 20:00 on the 18th, and the average value of 4 times is 22.3℃, it is expected to affect the fertility and seed production purity of the male sterile line. The 10 cm water layer is used for irrigation, the water temperature of the irrigation river is 28.9 °C, the water temperature of the water inlet is 2...

Embodiment 3

[0018] In 2005, the applicant unit planted 1 mu of Pei'ai 64S test field, and set up two methods of wet irrigation (control) and deep water flow irrigation (treatment). During the sensitive period of fertility, there were 7 days from August 18th to August 26th under the influence of low temperature below 24°C. The PTWD-2A temperature sensor data collector (TRM-ZS1 type) is used to automatically collect data every 30 seconds, and calculate the temperature and temperature of the plant stems 20 cm above the ground measured at 02:00, 08:00, 14:00, and 20:00 every day. The measurement results proved that the average stem temperature and average temperature of 20cm plants in the control field for 7 days were 22.9°C and 22.5°C, respectively, while the average stem temperature and average temperature of 20cm plants in the treated field with running water irrigation were 23.3°C and 24.6°C, respectively. The average fertile pollen percentages of the control and treatment fields were 17....

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Abstract

The present invention discloses a monitoring method of hypothermal sensitive sterile rice fertility conversion. Said method includes the following measures: when the atmospheric temperature is below 24 deg.C, utilizing infrared temperature-measuring instrument or temperature sensor to measure average stem temperature of plants and average atmospheric temperature; when the average stem temperature of plants is less than 22.8 deg.C or average atmospheric temperature is less than 23.1 deg.C, adopting river water whose water temperature is higher than 25 deg.C to make flowing water irrigation to regulate plant temperature or atmospheric temperature and make the average stem temperature of plants be above 22.8 deg.C or make the average atmospheric temperature be above 23.1 deg.C so as to stabilize the sterility of sterile line.

Description

technical field [0001] The invention relates to a method for monitoring the fertility conversion of low-temperature-sensitive sterile rice, which is suitable for two-line hybrid rice seed production using low-temperature-sensitive male sterile rice as the female parent. Background technique [0002] my country's two-line hybrid rice research has achieved world-leading theoretical and practical results. By 2005, the cumulative planting area had exceeded 8 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 accumulatively planted more than 5 million hectares 2 , is the rice variety with the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G16/00A01H1/00A01H1/02A01G22/22
Inventor 吕川根邹江石姚克敏胡凝宗寿余孙永华张启军夏士健漆庆明
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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