Mw. E.C. (Estelle) Verzaux: Resistance and susceptibility to late blight in Solanum: gene mapping, cloning and stacking

  Nieuws
  Perskamer
  Archief
  Agenda
  2012
  2011
  2010
  2009
  2008
  2007
  2006
  2005
  2004
  2003
  2002
  2001
  2000
  1999
  Nieuws
  RSS
  Agenda
  Open dagen
  Cursussen
  Promoties & Oraties
  Congressen en symposia

17 jun 2010 11:00
Onderdeel: Wageningen University
Locatie: Aula, gebouw 362, Gen. Foulkesweg 1, Wageningen
Organisatie: Wageningen University
Promotor: prof.dr. R.G.F. Visser (Plantenveredeling ihb genetische variatie en reproductie)
Promotor: Prof.dr.ir. E. Jacobsen

 The potato late blight disease, caused by the oomycete Phytophthora infestans, is a major threat for potato production worldwide. To breed potato varieties with durable resistance against P. infestans, it is necessary to combine two or more resistance (R) genes. Single R genes are easily overcome by the rapidly evolving pathogen, whereas the presence of several R genes could probably prevent gain of virulence from a single mutation in the pathogen. The large gene pool available within wild potato species offers sufficient possibilities to identify new and diverse R genes conferring resistance to P. infestans (Rpi). Map-based cloning is the most suitable strategy to isolate such new Rpi genes. The objective of this research was mapping, if possible, followed by cloning of Rpi genes from wild Solanum species. Resistance to P. infestans occurring in four different wild Solanum species were mapped in a major R gene cluster on chromosome 11. Natural stacking of three R genes located on different chromosomes was identified in a natural hybrid. In addition, we initiated studies on another type of defense system that is not based on the typical R genes, namely the response of Solanum to INF1 elicitin.
Print dit agenda item