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Method for judging and selecting dim light tolerance

A low-light, crop-resistant technology, applied in the fields of botanical equipment and methods, horticultural methods, plant cultivation, etc., to shorten the selection cycle, enhance convenience and operability, and speed up the selection progress.

Active Publication Date: 2015-04-08
INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The reproductive growth period of crops is an important stage for crops, especially economic crops, to obtain economic yields. There are many methods for identifying and selecting crops for tolerance to low light, but so far there is no use of the degree of reduction in the number of spikelets on the main stem to identify weak tolerance of crops during the reproductive growth period. light reports

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  • Method for judging and selecting dim light tolerance
  • Method for judging and selecting dim light tolerance
  • Method for judging and selecting dim light tolerance

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Embodiment 1

[0048] The winter wheat varieties tested were Shijiazhuang 8, Shi 4185, Luohan 2, Shixin 828, Jimai 32, Ningmai 16, Shixin 733, Xifeng 20, and Henong 825. Sowed on October 14, 2011, the sowing density was 200,000 / mu; according to urea 450kg / hm 2 , diammonium hydrogen phosphate 225kg / hm 2 Apply basal fertilizer; mark the AD value at the flag-raising stage after sowing, and perform low-light treatment when the AD value is -2-2cm; the low-light is 10% of the normal light. figure 1 It is a photo related to the low light stress treatment of this embodiment.

[0049] Analysis 1. The effect of low light stress treatment on the yield and biomass of different wheat varieties during the microspore development stage.

[0050] When the crops are mature, the main stems with the AD value marked between -2cm and 2cm in the early reproductive growth period are harvested from the base of the stems together with the spikes, and the dry weight of the main stems, grain weight, non-grain stem dr...

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Abstract

The invention discloses a method for judging and selecting dim light tolerance. The method includes steps of A, sowing, regularly sowing crop seeds in the growth environment manually controlled; B, identifying microsporogenesic stage, to be specifically, starting dim light stress treatment when AD value of more than a half crop stems ranges from -2 cm to +2 cm after a flag leaf elongating stage; C, performing dim light stress treatment, to be specifically, reducing the light intensity to 0-10% of that in sunny days, keeping for 3-5 d; D, counting spike kernels of the stems, to be specifically, counting in a middle grouting state; E, judging dim light tolerance of the crops. The method for judging and selecting dim light tolerance has a great significance for the crops in facing with the adverse environment of haze, rainy and sparse sunlight weather, global dimming and the like.

Description

technical field [0001] The invention relates to the technical field of crop cultivation and planting, in particular to a method for quickly selecting low-light-tolerant crops. Background technique [0002] Global climate change, weaker light or less rainy days threaten crop production: Light intensity is an important environmental factor that affects crop photosynthesis, growth and yield. With global climate change, industrial development, and increasing population density, aerosols and other pollutant particles in the air continue to increase, which significantly reduces the effective solar radiation reaching the earth's surface, and the earth's surface is getting darker (Stanhill and Cohen, 2001 ; Ramanathan and Feng, 2009; Li et al, 2010; Mu et al, 2010). In the Huanghuai-Hai wheat area and the middle and lower reaches of the Yangtze River, where the wheat area accounts for about 70% of the country, the total solar radiation decreases at an average rate of -4.5W / m every ...

Claims

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Application Information

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IPC IPC(8): A01G1/00A01G7/00
CPCA01G7/00A01G22/00
Inventor 董宝娣董文琦刘孟雨师长海乔匀周赵欢郑鑫张明明陈骎骎
Owner INST OF GENETICS & DEVELOPMENTAL BIOLOGY CHINESE ACAD OF SCI
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