Method for creating ornamental sunflower purple-flower novel variety with high selfing setting percentage

Abstract

The invention discloses a method for creating ornamental sunflower purple-flower novel variety with high selfing setting percentage. The method adopts the scheme with the following steps of hybridizing the varieties with far genetic relationship, and segregating the hybrid F2 population to obtain a purple-flower sterile single plant; using the purple-flower single plant as a female parent, and selecting the parent with higher selfing setting percentage as a male parent to hybridize; after hybridizing, producing the fertile and sterile purple-flower single plants; using the purple-flower fertile single plant as the female parent, and using the previous male parent as a recurrent parent to backcross for multiple generations; after backcrossing for multiple generations, performing selfing, soas to obtain the purple-flower novel variety with genetic stability and high selfing setting percentage; during pollination in the hybridizing process each time, combining the artificial pollen brushing type and the bee pollination type. The method has the advantages that the purple-flower sunflower seed resource with high setting percentage can be effectively obtained; the innovation cycle of the material is short, and the required sunflower seed resource can be innovatively obtained after 5 to 6 generations; the technique is simple, and the operation is easy.

Description

technical field [0001] The invention relates to the technical field of plant genetics and breeding, in particular to a method for creating a new sunflower strain of ornamental self-fertilization and high seed setting rate. Background technique [0002] Sunflower (Helianthus annuus L.) belongs to the genus Helianthus of the Compositae family, and is the second largest oil crop in the world after rapeseed. In peanuts, significantly higher than other oil crops. Sunflower is native to North America. Through artificial cultivation, it has formed varieties with many different genetic polymorphisms. It is an oil plant that is resistant to salt, alkali, drought, barrenness, and wide adaptability. Sunflower leaves are luxuriant and wide, with a large light quantum flux density, which can intercept 95% of sunlight, and can well cover the light intensity directly hitting the ground, thereby reducing the evaporation of ground water and effectively inhibiting the accumulation of salt on...

AI Technical Summary

Problems solved by technology

In addition, sunflower is a cross-pollinated plant, and most of the germplasm resources have poor self-fertilization. Through the unremitting efforts of sunflower breeding researchers, the self-fertilization of food-eating and oil-using sunflowers has been greatly improved. The current sunflower Breeding is also mainly focused on the innovation of edible and oil-use materials and the breeding of new varieties, while there are few research reports on ornamental sunflowers, and there are no related reports on new ornamental sunflowers with high seed-setting rate and high seed-setting rate.