test
node1
TO:0000315
bacterial disease
response
node2
TO:0020066
barley leaf streak
resistance
node1->node2
node3
CO_321:0001019
wheat bacterial leaf
streak severity trait
node2->node3
node4
TO:0000387
plant trait
node5
TO:0000164
plant stress trait
node4->node5
node7
TO:0000179
biotic plant stress
trait
node5->node7
node6
TO:0000112
microbial disease
response
node6->node1
node7->node6