Breeding and Evaluation of a New Flue-cured Tobacco Variety Yuyan7 and its Characteristics

Yuyan7(Y017), a new flue-cured tobacco variety of F1 generation was developed from the cross between MSKY2 (female parent) and 66401 (male parent), passed the evaluation of National Tobacco Variety Evaluation Committee in November, 2010. The genetic traits of Yuyan7 were stable and the plants grew uniformly and strongly in field. Yuyan7 was resistant to black shank, moderately resistant to bacterial wilt and brown spot, resistant to PVY, moderately susceptible to TMV and root knot nematode. It had strong tolerance to drought and cold. Its main economic characters were better than the control variety NC89. Yuyan7 demonstrated better appearance quality than NC89. Yuyan7 demonstrated favorable chemical components in harmonious proportion, with higher content of potassium. The blade thickness was uniform, the leaf tobacco of Yuyan7 had better fragrance and fragrant quantity in full, with better sensory quality, has the good value in industry.Yuyan7 was good in yield, quality and disease resistance, and had the rich fragrance characteristic flue-cured tobacco variety.