Hybridization and breeding method of BMR genotype sudangrass

Abstract

The invention provides a hybridization and breeding method of BMR genotype sudangrass. The hybridization and breeding method of the BMR genotype sudangrass comprises the following steps: carrying outhybridization by taking the sudangrass as a male parent to obtain F0-generation hybrid seeds; planting the F0-generation hybrid seeds, selecting 8-10 true hybrids, and carrying out bagging and selfingto obtain F1-generation group mixed seeds; carrying out F2-F7 generation selection according to a pedigree method, wherein the selection standard is as follows: the midrib is brown, plants are compact, and the included angle between a tillering stem and a main stem is within 5 degrees; the tillering performance of a single plant is strong, and the number of effective tillers is more than 4; the tiller stem and the main stem have the same growth vigor and the same height, and the florescence difference is not more than 7 days; the size of panicles is moderate, and the panicle type is medium scattered; carrying out individual plant selfing with disease resistance and lodging resistance of more than 1 level; and finally obtaining the BMR genotype sudangrass through selection of six successive generations. The BMR genotype sudangrass bred by the invention enriches a sudangrass germplasm resource gene bank.

Description

technical field [0001] The invention belongs to the technical field of breeding methods for forage grass varieties, and relates to a method for breeding sudan grass, in particular to a hybrid breeding method for BMR genotype sudan grass. Background technique [0002] Sudan grass (Sorghum sudanense (Piper) Stapf.) is a herbaceous plant of the Gramineae Sorghum genus. Because of its strong drought resistance, regeneration and good palatability, it is an annual high-quality forage suitable for planting in northern agricultural areas. According to the color of the midrib of the leaves, sudan grass varieties can be divided into three types: white vein, wax vein, and brown midrib. There are many types in China, most of which are white-veined and wax-veined varieties. When these two types of varieties are used in the late stage of grouting, they should be the best utilization period with the accumulation of dry matter. However, the degree of lignification of the stems is significan...

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Problems solved by technology

[0004] There is no content related to the breeding methods and standards of BMR genotype Sudan grass in the prior art

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