test
node1
TO:0000387
plant trait
node2
TO:0000392
sterility or
fertility trait
node1->node2
node3
TO:0000485
sterility related
trait
node2->node3
node4
TO:0000437
male sterility
node3->node4
node5
TO:0000106
male sterility type
node4->node5
node6
TO:0000580
cytoplasmic male
sterility
node5->node6
node7
TO:0000232
rice cytoplasmic male
sterility
node6->node7