Breeding method of photoperiod high-sensitive BMR sorghum sterile line

Abstract

The invention discloses a breeding method of a photoperiod high-sensitive BMR sorghum sterile line, and belongs to the technical field of breeding methods of forage varieties. According to the breeding method, a BMR sorghum maintainer line serves as a female parent, photoperiod high-sensitive forage sorghum serves as a male parent, hybridization and combination of the female parent and the male parent are implemented in Sanya city, Hainan province, the photoperiod high-sensitive BMR sorghum maintainer line is bred by the aid of differences of long and short sunshine time, selection standards of the maintainer line include that non-heading or late-heading brown midrib single plants at a growth stage are selected under north spring sowing long sunshine conditions, heading brown midrib singleplants within 60 days are selected under short sunshine conditions in Sanya city, Hainan province, and continuous breeding of six generations is implemented to obtain the photoperiod high-sensitive BMR sorghum maintainer line. Backcross breeding of the maintainer line and a common sorghum sterile line is implemented, completely sterile brown midrib single plants with agronomic characters consistent with those of the photoperiod high-sensitive BMR sorghum maintainer line are selected in backcross population to obtain the photoperiod high-sensitive BMR sorghum maintainer line. According to themethod, a sorghum sterile line gene bank is enriched.

Description

technical field [0001] The invention belongs to the technical field of breeding methods for forage varieties, and relates to a method for breeding light-sensitive sorghum, in particular to a method for breeding a sterile line of BMR sorghum with strong photoperiod sensitivity. Background technique [0002] Forage sorghum is a general term for various sorghum crops that are harvested from whole sorghum plants as forage. As a high-quality forage grass, it should be the best period of utilization when it is used in the late stage of grouting with the accumulation of dry matter. Substances are gradually transferred to the seeds of the reproductive organs, and the stems and leaves are gradually lignified, and most of the nutrients accumulated by photosynthesis are transferred to the seeds of the reproductive organs, resulting in a gradual decline in the quality of feed and causing certain difficulties in production and utilization. Photoperiod phenomenon has always been one of t...

AI Technical Summary

Problems solved by technology

With the development of grass animal husbandry and grain-to-feeding in China, especially in northern agricultural areas, the demand for photoperiod-sensitive BMR forage sorghum varieties is gradually increasing, and the lack of photoperiod-sensitive BMR sorghum male sterile lines has become a prominent one. Focus issues, and corresponding breeding methods, techniques and standards for photoperiod strongly sensitive BMR sorghum male sterile lines are not reported