Breeding method of forage-type BMR sorghum sterile line

Abstract

The invention discloses a breeding method of a forage-type BMR sorghum sterile line and belongs to the technical field of forage variety breeding methods. The breeding method includes: taking a BMR genotype sorghum maintainer line as a female parent and a forage-type sorghum maintainer line with tillering performance as a male parent for hybridizing, and breeding to obtain a forage-type BMR sorghum maintainer line, wherein standards include that midribs are brown, plant height is 140-160cm, and total leaf number is not less than 30; the tillering performance is high, and single-plant effectivetillering number is 2-4; tillering stem and main stem height difference does not exceed 5cm, and flowering period difference does not exceed 7d; ear characters are good, and ear length is 25-30cm; ear shape is intermediately tight; fruiting rate is higher than 98%; performing backcross transformation with a common sorghum sterile line, and selecting completely sterile BMR single plants consistentwith the forage-type BMR sorghum maintainer line in agronomic character in backcross population to obtain the forage-type BMR sorghum sterile line. The forage-type BMR sorghum sterile line bred by the method enriches sorghum sterile line gene pools.

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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