test
node1
TO:0000387
plant trait
node2
TO:0000371
yield trait
node1->node2
node3
TO:0000327
shoot system yield
trait
node2->node3
node4
TO:0001071
shoot axis tuber
yield
node3->node4
node5
CO_343:0000367
yam small size tubers
weight per plot trait
node4->node5