Method for authenticating and evaluating salt tolerance of seedling-stage wheat

Abstract

The invention discloses a method for authenticating and evaluating salt tolerance of seedling-stage wheat and belongs to the technical field of agricultural production. According to the method, plants are treated with manually prepared seawater, the membership value Xi of the salt damage rate of each of the four salt-tolerance indexes of the seedling-stage plant height increment, the seedling-stage root length increment, the overground part dry weight and the underground part dry weight is determined, the membership values Xi are accumulated and averaged to obtain the seedling-stage salt damage index Y, and the salt tolerance of the seedling-stage wheat is graded according to the seedling-stage salt damage index Y. The method for authenticating and evaluating the salt tolerance of the seedling-stage wheat not only is closer to actual coastal mud flat agricultural production, but also eliminates the influence of genetic backgrounds on the invested character values. The method for authenticating and evaluating the salt tolerance of the seedling-stage wheat is simple in operation, reliable in result, and capable of reflecting the salt tolerance of the seedling-stage wheat comprehensively and being effectively used for discovery of the salt-tolerance wheat variety and breeding of new varieties.

Description

1. Technical field [0001] The invention designs a method for identifying and evaluating the salt tolerance of wheat seedlings, specifically in the technical field of agricultural production. 2. Background technology [0002] According to reports, the total area of ​​salinized land in the world is about 400 million hectares, and in my country alone there are more than 70 million hectares (excluding the area of ​​secondary salinized soil), which are distributed in the main grain production areas such as Northwest China, North China and coastal areas. Agricultural production poses a serious threat. When plants suffer from salt damage, they show yellow wilt, leaves become smaller, and growth is inhibited. When the salt damage is severe, it will cause a large area of ​​crop production reduction, or even no harvest. At present, there are many studies on plant salt tolerance at home and abroad, but most of them are based on single salt (such as NaCl) or double salt (such as NaCl an...

AI Technical Summary

Problems solved by technology

At present, the identification of salt tolerance at the seedling stage of wheat is treated with NaCl, and the leaf growth is graded and analyzed manually. The accuracy is poor, the manual error is large, and the area is large, consuming more resources, and the leaf growth index is relatively simple. , can not comprehensively reflect the salt tolerance of wheat seedling stage, therefore, there is an urgent need for a method with high accuracy and less resource consumption to identify and evaluate the salt tolerance of wheat seedling stage

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