Matched cultivation method of stevia rebaudiana triploid hybrids

Abstract

The invention discloses a matched cultivation method of stevia rebaudiana triploid hybrids. The method comprises steps as follows: diploid materials of stevia rebaudiana are subjected to chromosome doubling, individual stevia rebaudiana plant materials of tetraploids and diploids to be subjected to matching hybridization are subjected to cutting propagation respectively, a large quantity of seed production parent strains of tetraploid and diploid stevia rebaudiana with consistent genetypes and reproductive traits are obtained respectively, the two seed production parent strains are planted in rows in the same field alternately for hybrid seed production, and due to the self-incompatible characteristic of the stevia rebaudiana, the stevia rebaudiana triploid hybrids are obtained after natural hybridization. According to the huge plant triploid organs, the leaf yield of the stevia rebaudiana can be remarkably increased with the adoption of the measure.

Description

technical field [0001] A method for supporting breeding of stevia triploid hybrids, relating to stevia triploid breeding technology, more specifically a method of hybridizing diploid stevia and tetraploid stevia to breed triploid stevia hybrid approach. Background technique [0002] Among the crops, many crops have bred triploid high-yield and high-quality new varieties, which have brought breakthrough improvements in crop yield and quality. The specific method is to take watermelon as an example. Homozygous diploid watermelon seeds and homozygous tetraploid watermelon seeds are bred into seedlings, planted alternately on the same piece of land, and let them carry out directional hybridization. The obtained seeds are namely It is a triploid watermelon seed. At present, stevia is produced using conventional varieties or even farm varieties from various places. The yield is low and unstable, and the quality is uneven. Triploid plants have the characteristics of gigantic rep...

AI Technical Summary

Problems solved by technology

If diploid and tetraploid Stevia seedlings are planted in the same field, not only diploid and tetraploid can cross each other, but diploid and tetraploid groups will also pollinate and hybridize each other, so the The seeds produced will be messy, including triploid hybrids, tetraploid and diploid seeds, making the population seriously mixed and unable to meet the standardization requirements of agricultural production

Due to the large amount of flowers, small fruits, and few seeds per flower, it is obviously impossible to mass-produce stevia seeds by artificial hybridization