Seed breeding method for shortening growing period of cabbage type rape and enhancing lodging resistance property

Abstract

The invention discloses a seed breeding method for shortening growing period of cabbage type rape and enhancing lodging resistance property. The seed breeding method is characterized in that by utilizing the characteristic of the definite inflorescence capable of effectively shortening the growing period and enhancing the lodging resistance property, the complicated quantitative characters of transformation early maturing, lodging resistance and the like are avoided; by utilizing a molecular marker to select a target character gene in an assisting way, the losing of the target character gene in the backcross process is avoided, the selection efficiency is improved, the seed breeding cycle is shortened, and the workload is reduced; after breeding, the definite inflorescence line which has the same genetic background with the corresponding infinite inflorescence can be obtained, and the characteristic of the definite inflorescence is also realized on the basis of reserving the excellentcharacters of the infinite inflorescence.

Description

technical field [0001] The invention belongs to the technical field of rapeseed breeding, and relates to a breeding method for shortening the growth period of Brassica napus and enhancing its lodging resistance. Background technique [0002] At present, in my country's high-altitude rape production areas and southern double-cropping rice three-cropping system areas, breeding early-maturing, lodging-resistant fine rapeseed varieties is still the main goal of rapeseed breeding at this stage. In crude oil rape production areas on the Qinghai-Tibet Plateau with a short frost-free period, especially in areas above 2,950 meters above sea level, the existing early-maturing rapeseed varieties are still unable to mature normally, and the cabbage-type rape varieties cultivated in the 1960s are still planted in production. Its yield, quality and lodging resistance are poor. In the southern double-cropping rice and three-cropping system, the cultivation mode of "oil-rice rotation" has ...

AI Technical Summary

Problems solved by technology

[0004] There are mainly the following disadvantages in the process of traditional transfer of early maturity and lodging resistance traits: 1. The workload of phenotypic identification is relatively large: a large segregation population is required in the traditional transfer process, and early maturity and lodging resistance of individual plants in large segregation populations are tested. 2. The selection efficiency is low: Since the above two traits are controlled by polygenes, there are many major genes and minor genes involved, and it is difficult to effectively aggregate multiple genes in traditional breeding. Larger, lower selection efficiency; 3. It is difficult to simultaneously transfer early maturity and lodging resistance traits; 4. There is a contradiction between early maturity and high yield

Images