Method for identifying paddy rice kind high temperature resistance performance

Abstract

The invention provides a method for identifying paddy rice kind high temperature resistance performance, comprising steps of adopting a phytotron to perform multi-gradient temperature processing during whole the paddy rice flowering period, performing fertilization rate counting on the paddy rice which is processed by various temperatures, and adopting the paddy rice high temperature comprehensive evaluation index to evaluate the high temperature resistance performance of the paddy rice type. The method disclosed by the invention can obtain the high temperature reaction curves of the fertility periods of various types, accurately reflects the real high temperature performance of the paddy rice type and the paddy rice breeding material; diurnal change configuration of each temperature processing simulates the typical regional high temperature weather condition, which enables the environment configuration to be more scientific; and the invention adopts the phytotron as a high temperature processing device, which enables the processing condition to be stable and reliable and enables the result to be good in repetition.

Description

technical field [0001] The invention relates to the technical field of identification and evaluation of rice varieties and germplasm resources, in particular to a method for identifying high temperature resistance performance of rice varieties. Background technique [0002] With the intensification of global warming and the increasing frequency of extreme high-temperature weather, high-temperature heat damage seriously threatens rice production, and there have been frequent incidents of large-scale and severe yield reductions due to heat damage. Studies have shown that the reproductive growth period of rice, especially the flowering period, is a sensitive period for rice heat damage, but at present, the temperature of rice reproductive growth period in many major rice production areas often has weather close to or higher than the sensitive temperature, so rice is resistant to high temperatures. It has become a serious problem that must be seriously faced in production. Seco...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used method of rice high temperature tolerance is the artificial climate chamber identification method. Generally, rice is planted in pots, and the artificial climate chamber is used to set a specific temperature for temperature treatment during the critical growth period. Its sensitive starting temperature is different, and a single temperature cannot detect the temperature response curves of multiple varieties. Therefore, it cannot accurately reflect the difference in high temperature resistance of rice varieties, so that it is impossible to make a true and correct evaluation of rice varieties.

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