The Method of Identifying High Temperature Resistance of Rice at Heading Stage

Abstract

The invention provides a method for identifying high temperature resistance of rice during a heading period. The method includes the first step of setting an identification region for identifying the high temperature resistance of the rice, the second step of setting rice samples needing to be identified to be samples for identification of the high temperature resistance of the rice during the heading period, and planting the rice samples in the identification region, and the third step of arranging a heating device in the identification region to carry out abnormal high-temperature processing on the rice samples for identification of the high temperature resistance of the rice during the heading period. According to the method, the rice samples are kept in a fully adverse high-temperature environment during the heading period, ears of rice of different single plants, arranged in order, of the rice samples during the corresponding period are subjected to different high-temperature processing, and the same ear of rice is subjected to relatively similar high-temperature processing so that identification and evaluation of the high temperature resistance of different new rice varieties or breeding materials during the heading period can be guaranteed. The method is applicable to the identification of the high temperature resistance of the varieties of large-scale rice samples needing to be identified in the fully adverse environment, the maturing rate of the high-temperature rice during the heading period is accurate, the method is scientific and the identification cost is low.

Description

Technical field: [0001] The invention belongs to the technical field of agricultural production and relates to a method for identifying the high temperature resistance of rice, in particular to a method for identifying the high temperature resistance of rice at the heading stage. Background technique: [0002] As the global climate warms, abnormally high temperatures often occur during rice growth and development seasons. If the rice which is in the heading and flowering stage encounters abnormally high temperature weather, the heading and flowering will be affected, resulting in a decrease in pollen vigor, leading to flowering loose pollen and pollen fertilization obstacles, which will greatly reduce the seed setting rate, resulting in a large area of ​​rice production. The country's food security and social stability were affected. For example, in 2002, the high temperature in Chongqing harmed Liangyoupeijiu and other medium rice combinations, resulting in a large-scale r...

AI Technical Summary

Problems solved by technology

"Field staged sowing test identification" does not require facilities, the test environment is natural production conditions, and a large number of variety samples can be identified, but the abnormally high temperature conditions required for the test are difficult to meet in specific years and seasons, so it is difficult to obtain identification results

The artificial climate chamber is the most advanced artificial control facility for climate conditions, which can artificially create high temperature conditions, but the air humidity, temperature change, air composition, and air flow in the climate chamber during the "artificial climate chamber treatment test appraisal" are all different from those under natural conditions. There are large differences in the paddy field environment, which will interfere with the firmness of rice varieties, and the construction and use costs are high, and the test space is small, so it cannot adapt to the identification of large quantities of variety samples

In particular, in the identification of the same batch of identified variety samples, the "Field Staged Sowing Test Appraisal" not only cannot guarantee that all of the panicle flowering process will be subjected to abnormal temperature treatment, but also cannot make the same batch of identified variety samples simultaneously obtain abnormal temperature. Weak to strong full adversity treatment; although "artificial climate chamber treatment test identification" can set multiple abnormal temperature environments from weak to strong, the premise is that there must be multiple artificial climates equal to the number of abnormal temperature environments. In addition, it is impossible to create full adversity conditions in the same artificial climate room to distinguish the high temperature sensitivity of different varieties

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