test
node1
TO:0000250
plant vigor trait
node2
TO:0000068
lodging incidence
node1->node2
node3
CO_320:0000080
rice lodging
incidence trait
node2->node3
node4
CO_320:0001041
rice LodInc_Meas_pct
variable
node3->node4
node5
TO:0000387
plant trait
node5->node1