Investigations of changes in resistance of PI88788 to field populations of soybean
cyst nematode. Jamal Faghihi, Purdue University, Principal Investigator
Most soybean varieties with resistance to soybean cyst nematode (SCN) utilize
PI88788 as the source. Previous research conducted by the University of Illinois
suggests PI88788 may be losing its effectiveness against SCN. This project will
determine the current effectiveness of PI88788 as a source of resistance to SCN
in several North Central states and determine the effectiveness of other sources
of SCN resistance in areas where PI88788 may no longer be effective.
Tennessee: So far SCN has been found in 40 percent of 321 soil samples. Every
SCN population found so far is able to reproduce on PI88788.
Illinois: Close to 40 new samples have been collected thus far from different
fields around the state. More than 100 cultures of SCN are available from collections
carried out in previous years that will be compared to recent samples.
Indiana: Twenty-seven percent of 1,122 field soil samples with SCN are able to
reproduce on PI88788.
Ontario: Twenty-six percent of 550 random soil samples were found to have SCN.
Of the total number of samples collected, 60 percent were from known non-infested
areas in Eastern Ontario.
The study is ongoing as the researchers are trying to determine the extent to
which SCN can reproduce on PI88788. Jamal Faghihi of Purdue University is directing
this research.
SCN
Survey