Mating method for stevia rebaudiana hybrid seed production

Abstract

The invention discloses a mating method for stevia rebaudiana hybrid seed production. The mating method includes the steps that the parent single plant of stevia rebaudiana is subjected to tissue culture and propagation, parent plant systems which are consistent in genotype and reproduction feature are formed, the two different parent plant systems are planted alternately in rows in the same field to conduct mutual natural hybridization, and stevia rebaudiana hybrid seeds are obtained. The mating method overcomes the defects that stevia rebaudiana seed seedling groups cannot conduct directional hybridization, group separation is large and characters are instable, and good stevia rebaudiana hybrid seed combinations which are relatively stable in character can be provided.

Description

technical field [0001] The invention relates to the seed production technology of stevia hybrids, in particular to a matching method for stevia hybrid seed production. Background technique [0002] At present, the varieties of stevia used are all conventional varieties selected by systematic breeding or hybrid offspring separation. The technical level of variety breeding is low, which seriously limits the development of stevia production. According to the genetic law of crops, hybrid seed production technology can be used to take advantage of the heterosis of the F1 generation to combine the advantages of different Stevia parents, greatly improve the economic yield and quality of Stevia, and bring new economic growth points to the seed industry. [0003] According to the general method of hybrid seed production of crops, the seeds of the parents are directly broadcast or transplanted into a piece of farmland for mutual hybrid seed production to produce hybrid seeds of the F1...

AI Technical Summary

Problems solved by technology

However, if Stevia rebaudiana uses two populations of seedlings to carry out natural hybridization in the field, not only will there be mutual hybridization between the two populations, but there will also be hybridization between the plants within the population, and the population traits of the offspring will be disorderly, and it is impossible to form predictable Stable shape, also can not be applied to production