Paddy rice heatproof breed ear period selecting method

Abstract

The invention discloses a paddy rice heatproof breed ear period selecting method; when a sample breed grows to a 3-leaf-1-heart period, the samples are transplanted to a transplanting barrel, and respectively placed in land and a greenhouse; high temperature processing is carried out for the sample breed in the greenhouse, and the sample is moved to the land, and forms a matched group with the sample in the land until maturation; finally a heatproof coefficient is calculated according to a high temperature processing maturing rate / matched maturing rate, and hear resistance conditions of the different sample breeds are analyzed. The ambient temperature in the high temperature processing period can be increased by artificial heating, so selection pressure is increased, thus more accurately selecting heatproof material; in addition, shading treatment is carried out in a booting stage, thus ensuring a consistent paddy rice florescence; stems of paddy rice of different florescence are cut off before high temperature processing, thus ensuring consistent processing period.

Description

technical field [0001] The invention relates to a method for screening rice heat-resistant varieties at earing stage. Background technique [0002] With the trend of global warming becoming more and more serious, the harm of high temperature to rice is becoming normalized. Once heat damage occurs, it will cause large-scale production reduction, and even crop failure in severe cases. High temperature heat damage has already threatened my country's grain Production safety. [0003] The research on high temperature heat damage of rice is still in its infancy. Although some gratifying results have been obtained, neither the evaluation system nor the research methods of high temperature heat damage are mature enough. Judging from the current reports, there are many ways to treat high-temperature heat damage, and there is no unified standard. Therefore, how to improve high-temperature treatment methods is an urgent problem to be solved, and establishing a simple and accurate metho...

AI Technical Summary

Problems solved by technology

[0003] The research on high temperature heat damage of rice is still in its infancy. Although some gratifying results have been achieved, neither the evaluation system nor the research methods of high temperature heat damage are mature enough.