test
node1
TO:0000387
plant trait
node2
TO:0000357
plant growth and
development trait
node1->node2
node5
TO:0000933
plant phenological
trait
node2->node5
node3
CO_343:0000310
yam time to maturity
trait
node6
CO_320:0000082
rice maturity trait
node3->node6
node4
TO:0000469
days to maturity
node3->node4
node4->node6
node4->node3
node5->node3
node5->node4