A high-efficiency breeding method for high-yield hybrid green onions

Abstract

The invention discloses a high-efficiency breeding method capable of realizing high yield of hybrid green Chinese onions, belonging to the technical field of breeding of green Chinese onions. The high-efficiency breeding method employs a one-to-many pollination manner; the stigmas of female parents are smeared with a nutrient solution during hybridization; and each L of the nutrient solution comprises 0.5 g of potassium nitrate, 0.05 g of manganese sulfate, 15 ml of carrot juice and 15 ml of the extracted juice of lavender, with the balance being water. The method can retain the characteristicof high yield of the female parents in filial generations, gives play to the combining ability of different varieties and integrates a plurality of excellent properties into one variety. During hybridization, after the stigmas of female parents are smeared with the nutrient solution, the output, resistance and the like of dominant female parents in filial generations are improved compared with the original female parents even after plural generations of hybridization, and the proportion of dominant plants in offspring groups is increased by 21%, so breeding efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of scallion breeding, and in particular relates to a high-efficiency breeding method for high-yield hybrid scallions. Background technique [0002] Scallion is a biennial or perennial herbaceous vegetable crop native to my country. It has a cultivation history of more than 2,800 years in my country. After a long period of mixed selection or maternity selection, it has bred excellent local varieties suitable for the local ecological environment, cultivation conditions and consumer needs. or farm varieties. At present, domestic scallion production is mainly based on local varieties and farm varieties. Scallion is a typical cross-pollinated crop. The poor purity of seeds of conventional varieties leads to low yield, poor commerciality and weak disease resistance of scallions. Hybrids not only have high yield, uniformity, and good commerciality, but also have strong disease resistance. Research on hybrids is the...

AI Technical Summary

Problems solved by technology

[0003] At present, the male sterile line of green onion is generally used as the female parent in the production of a generation of hybrids. The female sterile line is selected by continuous backcrossing for multiple generations. The female parent has different degrees of decline during vegetative growth and reproductive growth. It is characterized by weak plant growth, small inflorescences, low seed setting rate of florets, more shriveled seeds, and low yield; Traits are the screening criteria for breeding. If you want to breed scallion varieties with many excellent traits, you need to go through multiple cross-breeding work, which takes a long time

[0004] Based on the above reasons, the problems in the prior art are that during the hybridization process, the progeny scallion female parent plants are weak in growth, low in yield, low in the proportion of dominant plants, and low in breeding efficiency.