Resistance to potato virus Y in solanum tuberosum ssp. andigena

Abstract

This study consists of five parts. The first part involvad the isolation, Identification and maintenance of a strain of potato virus Y, Results indicated that the strain involved belongs to the comraon group of strains or Yo» The second part deais with the screening for resistance to virus Y of three progenies - P64-, P66 and P69 - by means of field exposures. The results confirm the unsuitability of field exposures, especially for genetical studies. The segregations of P6^ and P69 after the second exposure show a tremendous increase in the number of susceptible seedlings.