VIEW ARTICLE

Inheritance of Resistance to Pseudomonas solanacearum in Solanum phureja. P. R. Rowe, Geneticist, Crops Research Division, ARS, USDA, Madison, Wisconsin, Madison 53706; Luis Sequeira, Professor, Department of Plant Pathology, University of Wisconsin, Madison 53706. Phytopathology 60:1499-1501. Accepted for publication 5 May 1970. DOI: 10.1094/Phyto-60-1499.

Selected clones of Solanum phureja had high levels of resistance to Pseudomonas solanacearum in greenhouse and growth chamber tests. Eleven hybrid families (50-100 plants each) involving seven parents were tested under growth chamber conditions by inoculation with a race 1 isolate of P. solanacearum from tomato (K-60). Each plant was inoculated by stem puncture at the prebud stage and held for 15 days at 28 C, 70 ± 3% relative humidity and 2,000 ft-c on a 14-hr photoperiod. The genetic hypothesis that best fits the observed resistant-susceptible ratios requires that three dominant and independent genes provide resistance. Although the results from all families agreed well with this model, there was evidence of modifying genes.