A method for identification of rice grain sterility caused by high temperature

Abstract

The invention discloses an identification method for rice grain sterility caused by high temperatures. The method comprises steps as follows: the humidity of a manual climate box is 70%-75%, and the mean daily temperature of high-temperature treatment is 33.0 DEG C; the mean daily temperature of contrast treatment is 27.0 DEG C; potting planting is adopted for rice; plants which ear and bloom in the same period are selected; high-temperature relative fructification is used as an identification index of high-temperature varieties; the mean fructification percentage of spikelet blooming on marked spikes during high-temperature treatment of the manual climate box is the high-temperature fructification percentage, and the mean fructification percentage of spikelet blooming on single spikes under the contrast temperature of the manual climate box is the contrast fructification percentage. The manual climate box is adopted, the reasonable temperature identification index is established, different high-temperature resistant rice varieties are screened out with certain cultivation management measures, a variety identification and heat damage evaluation method is provided for coping with rice high-temperature heat damage caused by climate warming, and the technical support is provided for reasonable layout of rice varieties and high-temperature heat damage control.

Description

technical field [0001] The invention belongs to the technical field of rice planting, and in particular relates to a method for identifying rice grain sterility caused by high temperature. Background technique [0002] Rice is one of the important food crops in my country, and it is of great significance to stabilize the planting area and output of rice. Global warming has resulted in frequent occurrence of high temperatures in crop production seasons. The addition of rice planting systems and methods has caused the rice flowering period to coincide with high temperature seasons, as well as the advancement of breeding technology. There are many types of crop varieties and rapid renewal. The high temperature resistance characteristics of crop varieties are unknown. High temperature Heat damage has led to a reduction in the production of grain crops in my country, which has become one of the main factors that seriously restrict the high and stable yield of grain crops in my cou...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for identifying rice grain sterility caused by high temperature, aiming at the phenomenon of global warming, changes in rice planting seasons and methods, many types of varieties, and unknown heat-resistant characteristics of varieties, rice production often encounters flowering and fruiting The high temperature during the period caused a decrease in the seed setting rate, resulting in a reduction in rice production

At present, there is no complete set of cultivation and management methods for high temperature tolerance identification of rice varieties.

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