Flue cured tobacco anti-black shank disease variety oriented cultivation method

Abstract

The present invention belongs to the technical field of tobacco breeding, and particularly relates to a flue cured tobacco anti-black shank disease variety oriented cultivation method, which comprises the following main breeding process: germplasm resource screening, parent strain selective pairing, F1 disease nursery identification, F2-3 generation disease nursery screening, F4-6 field identification, strain identification, strain comparison test, regional test, production test, and variety validation, and comprises: 1, selective pairing and hybridization of excellent complementary parent strain materials, wherein excellent complementary parent strain materials are screened from anti-black shank disease, high-yield and high-quality germplasm resource materials and are subjected to hybridization; 2, oriented cultivation, wherein the new strain with advantages of strong black shank disease resistance, strong drought resistance and high yield is selected. According to the present invention, the bred new flue cured tobacco anti-black shank disease variety has characteristics of significant black shank disease resistance, high yield potential, good quality and the like, such that the disease identification time at the late stage is saved, and the cultivation efficiency of the anti-black shank disease variety is improved.

Description

technical field [0001] The invention belongs to the technical field of tobacco disease-resistant breeding, and in particular relates to a method for directional breeding of flue-cured tobacco varieties resistant to black shank disease. Background technique [0002] Tobacco black shank is the most important disease in tobacco production, with high incidence and wide distribution, causing huge economic losses. The disease has not been found in Heilongjiang Province in my country, and it has occurred in other tobacco-growing provinces. For many years, the prevention and control of the disease has mainly adopted a comprehensive control method based on chemical control and combined with cultivation measures. Due to the long-term use of chemical agents, the resistance of many disease-resistant varieties has been lost, but the pathogens have developed resistance. In recent years, it is difficult to plant flue-cured tobacco in crop rotation due to the large area of ​​continuous lan...

AI Technical Summary

Problems solved by technology

[0004] In view of the traditional breeding technology of new flue-cured tobacco varieties, the "pedigree method" is mainly used, and the related identification of disease resistance and quality is carried out after the strain is stable. The breeding process is long and the efficiency is low.