A kind of method of using the method of backcrossing while stabilizing to transfer sterile lines of sorghum

Abstract

The invention provides a method for breeding a sorghum sterile line through a stabilizing and backcrossing method. Hybridization is carried out with Ji2055B as a female parent and Liao7050B as a male parent to obtain first generation seeds F1 of hybrid; the seeds F1 are planted, and seeds F2 are harvested with F1; the seeds F2 are planted, single plants F2 with good characters are selected to be backcrossed with Ji2055A to obtain first generation seeds BC1 of backcrossing, and F2 selfing is carried out to obtain maintainer line seeds F3; the first generation seeds BC1 obtained after backcrossing and the maintainer line seeds continue to be planted, single plants backcrossed well are selected to be backcrossed with maintainer line offspring, good single offspring plants are selected to be subjected to selfing so that maintainer line offspring can be obtained, the stabilizing and backcrossing method is utilized in this way until the sixth generation seeds BC6 of backcrossing, then, the sixth generation seeds BC6 of backcrossing are planted, and Ji5575A with good head progeny rows and a high combining ability are selected. Compared with a traditional backcrossing breeding method, the method has the advantages that 5-6 generations are shortened, time for new sterile line breeding is shortened, the breeding efficiency is improved, the colors of grains of bred new products are good, plants are short, and the prepared hybrid is high in ability of lodging resistance.

Description

technical field [0001] The invention belongs to the technical field of sorghum breeding, and in particular relates to a method for transferring male sterile lines of sorghum by using a backcrossing method while stabilizing. Background technique [0002] As the main raw material for brewing wine and vinegar, sorghum is widely planted in Jilin, Shanxi, Sichuan and other places in my country. Modern scientific research has proved that tannins in sorghum are beneficial to human health, and eating sorghum has a good therapeutic effect on obesity and hyperlipidemia. Therefore, the development of sorghum varieties with high yield and strong stress resistance has good economic benefits for improving the yield and quality of sorghum in my country. [0003] At present, the breeding of new sorghum varieties still adopts the traditional backcrossing transfer method, mainly parental hybridization, and the offspring are selected for multiple generations. 7 -F 8 When the traits tend to ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for transferring a sorghum sterile line by backcrossing while stabilizing, which solves the time-consuming problem of cultivating a new sorghum sterile line in the existing traditional backcrossing transfer method