test
node1
TO:0000327
shoot system yield
trait
node2
TO:0000871
fruit yield trait
node1->node2
node5
TO:0000396
grain yield trait
node2->node5
node3
TO:0000387
plant trait
node4
TO:0000371
yield trait
node3->node4
node4->node1
node6
CO_321:0000645
wheat grain yield
factor trait
node5->node6