Method for screening varieties with high utilization rate of nitrogen from multiple wheat varieties

Abstract

Provided is a method for screening varieties with the high utilization rate of nitrogen from multiple wheat varieties. The method comprises following steps: selecting wheat varieties with grains of the same size, placing the wheat varieties into a culture dish till the grains germinate to become rooted seedlings; selecting seedlings with growth uniformity from seedlings, dividing them into two groups and utilizing nutrition liquid with different nitrogen concentrations to pour till wheat become mature; testing and calculating relative strain height, relative grain number and relative thousand seed weight of each variety; making comprehensive comparisons and selecting several wheat varieties with three highest integrated indices as varieties with the high utilization rate of nitrogen; becoming re-screening seedlings through germination, taking re-screening seedlings with uniform growth, diving them into two groups, utilizing nutrition liquid with different nitrogen concentrations for water culture and testing and calculating relative dry matter weight, relative nitrogen content and relative chlorophyll content of each variety; and making comprehensive comparisons and selecting one wheat variety with three highest integrated indices as the variety with relatively higher utilization rate of nitrogen. The method for screening varieties with the high utilization rate of nitrogen from multiple wheat varieties has following beneficial effects: wheat varieties finally screened by the method provide material for further improvement of existing varieties and research of biological characteristics and physiochemical mechanisms.

Description

technical field [0001] The invention belongs to the technical field of wheat cultivation and breeding, and relates to a method for screening varieties with high nitrogen utilization efficiency from a plurality of wheat varieties. Background technique [0002] Wheat is a gramineous plant widely planted all over the world. It originated in the Fertile Crescent region of the Middle East. It is one of the earliest cultivated crops in the world. Wheat is rich in starch and protein. It can be ground into flour to make bread, steamed bread, Biscuits, noodles and other foods; after fermentation, it can be made into beer, alcohol, vodka, or biofuel. Wheat is one of the three major grains, and almost all of its production is used for food, and only about one-sixth is used as feed. In 2010, wheat was the food crop with the second largest production in the world (651 million tons), second only to corn (844 million tons). At present, the use of nitrogen fertilizer in my country's wheat...

AI Technical Summary

Problems solved by technology

Since the 21st century, researchers have successfully screened five varieties with high nitrogen use efficiency, such as rice, corn, and cotton, and conducted preliminary discussions on their mechanisms. At present, there are many varieties with high nitrogen use efficiency in wheat at home and abroad. Seedling stage screening is adopted, which is quite different from the field production environment

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