Sorghum dwarfing mutation breeding method

Abstract

The invention belongs to the field of sorghum breeding, and particularly relates to a sorghum dwarfing mutation breeding method. The method comprises the steps of conducting pretreatment after seed selection; conducting physical mutation, wherein sorghum seeds are put into a plastic bag for irradiation treatment; conducting chemical mutation, wherein the seeds subjected to irradiation treatment are soaked in a chemical mutation agent for treatment, and chemical mutation seeds are obtained; conducting mutation aftertreatment; screening dwarfing sorghum mutants; planting M1-generation seeds harvested from a single plant in the next year to form M2-generation strains, selecting untreated seeds as a contrast, comparing the flowering period with the contrast, observing the stability of the characters of the flowering period in the strains, conducting mixed harvesting and mixed threshing on the seeds which tend to be stable, harvesting M3-generation seeds, and obtaining a dwarf variant sorghum variety; and planting the strains with the characters continuously separated, continuing to plant and harvest the single plant, harvesting M3-generation seeds, and continuing to conduct identification and selection on the next system in the M4 generation till the dwarf variant sorghum variety is obtained.

Description

technical field [0001] The invention belongs to the field of sorghum breeding, and in particular relates to a sorghum dwarfing mutation breeding method. Background technique [0002] my country is a populous country, and sorghum is one of the three major grain crops. Sorghum production occupies a very important position in my country's agricultural production and national economy. The development of sorghum production has great practical significance for increasing farmers' income, ensuring national food security and even economic security. Although the total annual production of sorghum in my country has developed rapidly, the total annual production of sorghum is insufficient, and there is still a large gap with the market demand for sorghum in my country, so a large amount of imports is required every year. Affected by the lack of agricultural land resources per capita and the adjustment of agricultural planting structure in China, it is difficult to expand the sown are...

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Problems solved by technology

At present, my country's agricultural production lacks a systematic and effective sorghum planting model for increasing production and income

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