ÃÞ »¨ ѧ ±¨ Cotton Science 2010£¬22£¨5£©£º509-512
Dynamic Patterns of Verticillium Wilt of Transgenic Cotton Cultivars in the Field Abstract: The Verticillium wilt resistance of 17 transgenic cotton cultivars was identified in the field disease nursery in order to analyze the dynamic patterns of Verticillium wilt in 2008 and 2009. According to the disease index of different investigated times of all varieties in two years, the varieties were classified into four types based on clustering analysis. The results showed that the different varieties from the same type had very similar dynamic pattern, however, the varieties from different types presented obvious difference. Type ¢ñ had the lowest disease index at whole stage than that of the other types. Type ¢ò had two peaks at whole stage and showed higher disease index than that of Type ¢ñ. Type ¢ó had higher disease index at whole stage than that of Type ¢ò . Type ¢ô presented the high disease index at early stage, low disease index at middle stage and the highest disease index at late stage. Type ¢ô had two apparent peaks and the highest disease index than those of other types before August 20.
|