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Water-saving wheat variety identification screening method

A variety identification and screening method technology, applied in the field of wheat breeding, can solve problems such as unreliable water-saving identification methods, and achieve a strong guiding effect

Inactive Publication Date: 2015-04-22
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a water-saving wheat variety identification and screening method to overcome the unreliable defects of the water-saving identification method of wheat varieties in the prior art

Method used

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Embodiment 1

[0035]From October 2011 to June 2012, six winter wheat varieties including Jinmai 47, Luohan 2, Shijiazhuang 8, Yumai 18, Zhengmai 9023 and Yanmai 20 were identified for water use efficiency.

[0036] During the water critical period of winter wheat—jointing-booting stage, two soil moisture treatments were carried out: irrigation and drought. Irrigation conditions: relative soil moisture content = 75%, drought conditions: relative soil moisture content = 45%. The rest of the period is routine management.

[0037] Step (1) The total amount of water consumed by transpiration during the whole growth period of wheat varieties is measured:

[0038] Cultivate in plastic pots: choose a plastic pot with a diameter of 36cm, a height of 30cm, and a bottom diameter of 28cm; take medium-fertile tillage soil, sieve to remove impurities, mix in sufficient compound fertilizer, and after mixing, fill each pot with 17kg of soil; measure the soil The water content is 0.55%, and the saturated ...

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Abstract

The invention relates to a water-saving wheat variety identification screening method. The method includes the following steps that (1) water use efficiency of winter wheat varieties is identified and evaluated under two water conditions of irrigation and drought respectively; the water use efficiency of wheat varieties is evaluated through transpiration water consumption of a whole growth period of single plant grain yield / single plant wheat varieties; total water content in soil of each pot during harvesting is minus total water content in soil of each pot during sowing to obtain a value which is then plus complementary water amount after sowing and before harvesting / plant numbers of each pot to obtain total transpiration water consumption amount of the whole growth period of single plant wheat varieties; (2) total transpiration water consumption amount of the whole growth period of single plant wheat varieties is measured under drought condition and irrigation condition respectively by pot planting tests. The wheat variety whole growth period includes a complete growth period from sowing to harvesting, varieties with really high water use efficiency can be identified by the method in stead of high yield varieties under the irrigation condition, the screened varieties have high grain yield level and high water use efficiency, and the guidance for production is high.

Description

technical field [0001] The invention relates to a water-saving wheat variety identification and screening method, which belongs to the field of wheat breeding. Background technique [0002] To cultivate water-saving crop varieties, first of all, it is necessary to identify the water-saving properties of the varieties, screen out water-saving parent materials, and eliminate non-ideal offspring individuals. This requires a reliable identification method for water-saving properties of varieties. [0003] At present, many domestic breeders generally regard varieties with high yields under irrigation conditions in large fields as water-saving varieties. The main problem with this method is that the exact water use efficiency cannot be known without measuring the actual water consumption of the species. Some studies have shown that most of the high-yielding varieties under irrigation conditions consume a lot of water, and the actual water use efficiency is not high. Furthermore,...

Claims

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Application Information

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IPC IPC(8): A01G1/00G01N33/24
CPCA01G7/00A01G22/00G01N33/246G01N33/245
Inventor 钟秀丽梅旭荣严昌荣刘晓英郭瑞
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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