test
node1
TO:0000357
plant growth and
development trait
node2
TO:0000933
plant phenological
trait
node1->node2
node4
TO:0002616
flowering time trait
node2->node4
node3
TO:0000387
plant trait
node3->node1
node5
TO:0001021
days to inflorescence
exsertion
node4->node5