A SET OF DIFFERENTIAL GLYCINE HOSTS FOR THE IDENTIFICATION OF RACES OF PHAKOPSORA-PACHYRHIZI SYD

Variation in the responses of a wide range of accessions of 4 native Australian species of Glycine (viz. G. canescens, G. clandestina, G. tabacina and G. tomentella) to infection by 8 Australian isolates of P. pachyrhizi was analyzed. Differences in the infection type responses of the various wild Glycine species were sufficient to recognize 6 different virulence combinations amongst the 8 pathogen isolates. A set of differential hosts useful in the identification of different races of the pathogen is presented to facilitate further examination of the virulence of the pathogen population.