A kind of breeding method of forage type bmr sorghum sterile line

Abstract

The invention discloses a method for breeding a forage-type BMR sorghum sterile line, which belongs to the technical field of breeding methods for pasture varieties. The BMR genotype sorghum maintainer line is used as the female parent, and the forage-type sorghum maintainer line with tillering ability is used as the male parent to carry out hybridization. Firstly, the forage-type BMR sorghum maintainer line is bred. The standard is: brown midrib; plant height 140~ 160cm; the total number of leaves is not less than 30 pieces; the tillering ability is strong, and the effective number of tillers per plant is 2 to 4; the difference between the height of the tiller stem and the main stem does not exceed 5cm, and the difference between the flowering period does not exceed 7 days; 25-30cm; medium-tight spike shape; seed-setting rate over 98%. Then carry out backcross breeding with the common sorghum CMS line, select completely sterile BMR individual plants with the same agronomic characteristics as the forage-type BMR sorghum maintainer line in the backcross population, and finally obtain the forage-type BMR sorghum CMS line. The forage type BMR sorghum sterile line selected by the invention enriches the gene bank of the sorghum sterile line.

Description

technical field [0001] The invention belongs to the technical field of methods for breeding grass varieties, and relates to a method for breeding grass-type sorghum, in particular to a method for breeding grass-type BMR sorghum sterile lines. Background technique [0002] Sorghum bicolor×Sorghum sudanense is a distant hybrid of sorghum (Sorghum bicolor (L.) Moench) male sterile line and Sudan grass (Sorghum sudanense (Piper) Stapf.) as male parent, but Common sorghum male sterile lines are characterized by short stems, less total leaves, no tillering ability, poor regeneration after mowing, and are not suitable for forage utilization. The pursuit is aboveground biomass such as stems and leaves. Therefore, it is necessary to create some sterile lines of sorghum with more leaves, stronger tillering and regenerative properties to improve the feeding quality of Sorghum grass. [0003] Sorghum grass species can be divided into two types according to the color of the veins. The c...

AI Technical Summary

Problems solved by technology

Based on the current lack of new germplasm of forage-type BMR sorghum male sterile lines, and the corresponding breeding methods, techniques and standards have not been reported, it is difficult to meet the production needs. Therefore, the creation of sorghum with BMR genotype (brown midrib) Breeding lines are of great significance for the selection of BMR genotype Sorbus species suitable for feeding

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