A kind of breeding method of bmr sorghum male sterile line with strong photoperiod sensitivity

Abstract

A method for breeding a sterile line of BMR sorghum with strong photoperiod sensitivity, which belongs to the technical field of forage variety breeding methods. The BMR sorghum maintainer line is used as the female parent, and the forage sorghum with strong photoperiod sensitivity is used as the male parent. Sanya hybrid combination, using the difference between long and short sunshine to select BMR sorghum maintainer lines with strong photoperiod sensitivity. The selection criteria are: under the condition of long sunshine in spring sowing in the north, select brown midrib single plants that do not head or head very late in the whole growth period, in Sanya, Hainan Under short-day conditions, the brown midrib individual plants that headed within 60 days were selected; the photoperiod-sensitive BMR sorghum maintainer line was obtained through 6 consecutive generations of selection, and then backcrossed with the common sorghum male sterile line. The photoperiod-sensitive BMR sorghum maintainer line has a completely sterile brown midrib individual plant with consistent agronomic traits, and finally a photoperiod-sensitive BMR sorghum sterile line is obtained; this breeding method enriches the gene pool of the sorghum sterile line.

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