Year-round multi-round generation-adding breeding technique of Stevia rebaudiana Bertoni

Abstract

The invention provides a year-round multi-round generation-adding breeding technique of Stevia rebaudiana Bertoni. Through the effective control of three stages including seed germination and transplanting, seedling management and flowering management, three-round or four-round generation addition of the Stevia rebaudiana Bertoni is achieved, the breeding process is effectively accelerated, the breeding cycle is shortened, at the same time, the controllable greenhouse culture technology is used, the cross-region travel is avoided, the time is saved, and the human and material costs are reduced. The method is applied to the backcross and hybridization breeding of the Stevia rebaudiana Bertoni, and the breeding efficiency of the Stevia rebaudiana Bertoni can be greatly improved, and the process of result application is accelerated.

Description

technical field [0001] The invention relates to the technical field of plant breeding methods, in particular to a Stevia anniversary multi-round addition breeding technology. Background technique [0002] Stevia (Stevia rebaudiana Bertoni) belongs to the genus Asteraceae and is an emerging sugar crop. The steviol glycosides contained in its leaves have high sweetness and low calories (more than 300 times sweeter than sucrose, and only 1 / 300 of sucrose) It is a natural low-calorie sweetener, widely used in food, beverage, medicine, chemical industry and other fields. At present, my country is the world's largest stevia planter and exporter of steviol glycosides and raw materials. The selection and breeding of new stevia varieties is the basis for improving the yield and quality of stevia. Therefore, it is urgent to speed up the breeding process of stevia, and additional generation breeding is an important way to shorten the breeding period and speed up the breeding process. ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problems of long breeding period and high resource consumption in the existing stevia breeding technology, so as to provide a multi-round addition method of stevia anniversaries, from one ripening a year to three to four ripenings a year, Effectively speed up the breeding process, shorten the breeding period, avoid traveling between north and south, and save manpower and material costs