Method for creating winter dwarf male-sterile wheat with blue seeds

Abstract

The method relates to a method for creating winter dwarf male-sterile wheat with blue seeds. The method is characterized in that winter (or semi-winter) wheat is used as a male parent under a natural ecological condition in a winter (or semi-winter) ecological area; the dwarf male-sterile wheat with blue seeds is continuously subjected to back crossing with the male parent; the seeds of dwarf male-sterile wheat with blue seeds are selected from progeny individuals of the dwarf male-sterile wheat with blue seeds subjected to back crossing for sowing in autumn in order to naturally eliminate non-anti-freezing spring (or partial spring) dwarf male-sterile wheat plant individuals with blue seeds, the progeny individuals showing high anti-freezing performance in the wintering period, of winter dwarf male-sterile wheat plants with blue seeds, are selected and subjected to back crossing again; the date of sowing in autumn is gradually advanced each year, so as to gradually improve the selection of the winter dwarf male-sterile wheat with blue seeds; after performing back crossing to reach 8th to 10th generations, the winter dwarf male-sterile wheat with blue seeds can be created and has winter or semi-winter genetic background as well as blue seeds, dwarf stalks and male sterile linkage markers. With the adoption of the method, the genetic background of winter dwarf male-sterile wheat with blue seeds can be transformed from spring or semi spring property to winter or semi winter property, which creates conditions for applying wheat in Huang-Huai River Valley and north winter wheat regions based on the heterosis.

Description

technical field [0001] The invention relates to the technical field of wheat breeding, in particular to a method for creating winter (semi-winter) blue dwarf germplasm wheat. Background technique [0002] Heterosis is ubiquitous in the biological world, and the use of heterosis is an important way to greatly increase crop yield. Wheat is the largest food crop that has not yet been used in large-scale hybrids. People have long expected a breakthrough in the use of heterosis in wheat. At present, the three-line approach of heterosis utilization in wheat is limited by the maintenance ability of the maintainer line and the recovery ability of the restorer line, and no substantial application progress has been made. Due to the influence of climate instability factors, the light-temperature-sensitive pathway has not been widely used in bred varieties. The method of chemical male killing is difficult to control the timing of male killing, so the seed production is restricted, and ...

AI Technical Summary

Problems solved by technology

However, the cultivation environment in Sichuan has created its ecological genetic background of weak winter and partial spring