Breeding and Characterization of a New Flue-cured Tobacco Variety Zhongyan 207

The new flue-cured tobacco variety Zhongyan 207 is a male sterile hybrid with high quality aroma, as well as good disease resistance and yield. The male sterile line Yunyan 85 (MS Yunyan 85) is the female parent, and the new flue-cured tobacco line 0953, which has strong aroma and is resistant to weather spot disease, is the male sterile hybrid. In the field, Zhongyan 207 grows neatly and uniformly with strong vigor, with a tower shape plant type and an oval leaf shape. Comprehensive economic traits are slightly better than K326, but slightly lower than Yunyan 87. The cured leaves are mainly golden, with good structure, body and oil content. Chemical components are in harmonious proportion; sensory aroma quality, aroma volume, concentration and aftertaste are better than K326 and Yunyan87; Comprehensive quality is equivalent to K326, better than Yunyan87. It has better resistance to climatic speckle than K326 and Yunyan 87, and is moderately resistant to black shank and root knot nematode disease, while moderately susceptible to bacterial wilt and brown spot disease, susceptible to TMV, CMV and PVY. In summary, Zhongyan 207 is a new flue-cured tobacco variety with good quality, economic characters and disease resistance, which has strong adaptability and is suitable for planting in southeast China, Sichuan and Shaanxi tobacco areas.