Verticillium Wilt Resistance In NDSU Potato Genotypes As A Sustainable Management Strategy

摘要

The potato early dying complex is perhaps the most economically damaging problem for the potato industry in the US, considering yield loss and the cost of control (Gudmestad 2019). Potato early dying refers to the early senescence and death of the potato crop, and may be caused by several factors. Verticillium wilt (VW) is the major component of the early dying complex. It is caused by Verticillium dahliae Kleb. or Verticillium albo-atrum Reinke & Berthold. Both fungal species invade the host xylem tissue, causing vascular wilt by disrupting water transport. Wilt symptoms do not usually appear until the latter part of the growing season, during the rapid tuber bulking period, although fungal infection may have occurred early in the season (Johnson and Dung 2010). The first symptom is interveinal leaf chlorosis on individual or groups of plants, scattered among healthy plants. Wilting and necrosis of the stem follows and progress acropetally from the stem base. Eventually, the entire plant becomes necrotic, senescing prematurely, although it may remain upright.