Breeding method for improving drought resistance of paeonia suffruticosa Andr

Abstract

The invention belongs to the technical field of breeding of paeonia suffruticosa Andr and particularly relates to a breeding method for improving drought resistance of paeonia suffruticosa Andr. The method comprises the following steps: selecting a paeonia suffruticosa Andr variety with excellent characters as a female parent, selecting a paeonia suffruticosa Andr variety with stable yield as a male parent, hybridizing and harvesting hybrid first-generation seeds F1; planting the F1 and carrying out mixed harvesting to obtain hybrid second-generation seeds F2; back crossing F2 single plant with female parent to obtain backcross first-generation seeds BC1; back crossing the BC1 single plant with the female parent to obtain backcross second-generation seeds BC2; finally, planting the backcross second-generation seeds BC2, selfing for 3 to 4 generations and selecting the best strains as novel varieties of the paeonia suffruticosa Andr. During the treatment, water stress treatment is carried out by using a stress agent, and the germination of drought intolerant seeds can be stifled in the cradle, so that false positive drought-resistant seeds are reduced, the total sample quantity of subsequent hybridization steps is reduced, the workload is reduced and the breeding efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of peony breeding, and in particular relates to a breeding method for improving the drought resistance of peony for oil. Background technique [0002] At present, wild peony varieties in my country are mainly distributed in Henan, Shaanxi, Hubei, Gansu, Sichuan, Yunnan, Tibet and other places. According to incomplete statistics, there are more than 100 species with fruiting ability. Peony for oil refers to the type of peony with high seed yield, high oil content and high active ingredients. At present, the common peonies for oil are mainly Fengdan peony and purple spot peony. The unsaturated fatty acid content in Fengdan peony and purple spot peony seeds exceeds 90%, of which linolenic acid accounts for about 40%. Linolenic acid is an essential amino acid for human beings. It has the effects of refreshing the brain, enhancing memory, lowering blood fat, lowering blood pressure, and preventing cardiovascul...

AI Technical Summary

Problems solved by technology

However, due to the lack of oil-use peony varieties suitable for planting, stable yield, and drought resistance, the probability of producing new varieties is small and the breeding efficiency is low only by natural hybridization.

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