Breeding and propagation method of sterile line novel variety of flue-cured tobacco

Abstract

The invention discloses a breeding and propagation method of a sterile line novel variety of flue-cured tobacco. The method comprises the steps that a cytoplasmic male sterile line MSG28 of the flue-cured tobacco serves as a source of cytoplasm sterile genes, MSG28 serves as a female parent, CZ-1 serves as a recurrent parent, after hybridization is conducted, backcross is continuously conducted for six generations and a novel cytoplasmic male sterile line MSCZ-1 is obtained through cultivation; the sterile line MSCZ-1 serves as a female parent, a maintainer line CZ-1 serves as a male parent, outbreeding is conducted, and the sterile line MSCZ-1 is preserved. The flue-cured tobacco sterile line MSCZ-1 bred through the method has the advantages of being stable in sterility, excellent in agronomic trait, high in yield and output value, good in easy-curing property and curing resistance, good in appearance and internal quality of tobacco leaves, coordinated in chemical composition and the like, and novel excellent sterile line germplasm is provided for heterosis utilization research work of the flue-cured tobacco.

Description

technical field [0001] The invention belongs to the technical field of tobacco genetics and breeding, and in particular relates to a method for selection and propagation of flue-cured tobacco cytoplasmic male sterile lines. Background technique [0002] Flue-cured tobacco has strong heterosis performance in yield, disease resistance, growth period, growth vigor, etc., but because there is almost no obvious heterosis in tobacco leaf quality when crossing between flue-cured tobacco varieties, the work of utilizing flue-cured tobacco heterosis was once used by flue-cured tobacco breeding. Workers give up. In recent years, due to the fact that there are very few stereotyped varieties selected for breakthrough in flue-cured tobacco breeding in my country, the main varieties planted in the tobacco-growing areas of the country are single, the variety resistance is reduced, and pests and diseases are harmful to a large area, causing serious losses to flue-cured tobacco production in...

AI Technical Summary

Problems solved by technology

In recent years, due to the fact that there are very few stereotyped varieties selected in my country's flue-cured tobacco breeding, the main varieties planted in the national tobacco area are single, the variety resistance is reduced, and the damage of diseases and insect pests is widespread, which has caused serious losses to my country's flue-cured tobacco production.

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