Method for synchronously identifying drought resistance of rice in germination period and later period

Abstract

The invention belongs to the technical field of agricultural production, and provides a method for synchronously identifying the drought resistance of rice in the germination period and the later period. The method comprises the following steps: sterilizing seeds of a to-be-detected rice variety, putting into a culture dish, adding distilled water, and performing germination culture at 30 DEG C in a constant temperature incubator; picking seeds with uniform and consistent exposed buds, and performing abscisic acid culture and distilled water contrast culture; performing dark culture at 30 DEG C in the constant temperature incubator for 5 days; and measuring the dry weight of coleoptiles, calculating the inhibition ratio and identifying the drought resistance according to the inhibition ratio. By the method for identifying the drought resistance of indoor rice, abscisic acid replaces a hypertonic solution such as ethylene glycol, a problem that the conventional method for identifying the drought resistance of the rice in the early period cannot accurately reflect the drought resistance of the rice in the later period is solved, the drought resistance of the rice in the germination period and the drought resistance in the later period are synchronously identified, and the method has high promotion and application value.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and in particular relates to a method for synchronously identifying drought resistance in the germination stage and later drought resistance of rice. Background technique [0002] Drought occurs widely in our country, and it has become more severe in recent years. my country's arid and semi-arid areas account for about 51% of the cultivated land, mainly distributed in Northwest and North China. Although the southern rice region has abundant rainfall, due to the uneven distribution of each month, strong seasonal droughts also occur from time to time. Drought has become the most important obstacle factor affecting rice production. Therefore, it is of great significance to reasonably evaluate, identify and study the drought resistance of rice and to breed drought-resistant rice varieties to achieve high and stable rice yields in my country. How to improve the drought resistance of r...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for synchronously identifying drought resistance in the germination stage and later drought resistance of rice, aiming to solve the problem that the current rice germination or seedling stage drought resistance identification generally adopts the hypertonic solution method, that is, hypertonic solutions of different concentrations are used to treat the seeds. Dehydration treatment for germination or seedling growth will cause physiological drought of crops, observe the seed germination rate and whether the plants can grow normally, and combine with the determination of some indicators to identify the drought resistance of crop seedlings, but this method is inconvenient for the later stage of rice. Drought resistance identification, and the drought resistance of rice in the later stage directly affects the yield. At present, the identification of drought resistance in the later stage of rice is generally carried out under the conditions of soil water control in potted or pond planted plants in dry sheds. The identification takes a long time, and there is currently a lack of one that can be used for The problem of rice drought resistance identification method that can accurately reflect the drought resistance in the early stage

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