烤烟新品种“云烟203”的选育及特征特性

Yunyan203 was a male sterile hybrid and developed with MS317 as the maternal parent and KX13 as the paterna1 parent. Plants of Yunyan203 grew rather uniformly in the field with tower shapes and column shapes after being topped. The leaf was in long oval with moderate angle between leaf and stalk. The topped plant height of Yunyan203 was 113. 4cm with 21 harvestable leaves. Days needed for staying in the field from being transplanted to being harvested was about 127d. Yunyan203 was resistant to TMV and the black shank, moderately resistant to root-knot nematode and Granuville wilt, and was susceptible to brown spot, CMV and PVY. The economic traits was superior to or equivalent to K326 (CK). Yunyan203 possessed better appearance quality and coordination proportion among chemical compositions. Potassium content was higher than that of K326 (CK) under the same cultivation conditions. Yunyan203 was a good flue-cured tobacco variety in regarding the quality, the resistances, the yield and the adaptability, etc. It was suitable to grow in area with high incidence of TMV.