new tassel length child terms

[planteome-user]

Traits described in Brown et al 2011 that might be children of
TO:0000798, tassel inflorescence length/ TO:0000788, tassel infloresence and morphology trait.
(1) tassel branch zone, "length of tassel between lowest and uppermost branches"

(2) tassel spike length, "length of tassel from uppermost branch to tip"

Reported by: mlschaeffer

Original Ticket: obo/plant-trait-ontology-to-requests/272

[cooperl09]

name: tassel spike length TO:0000939
+def: "An inflorescence axis length (TO:0001072) which is the length of the first order tassel inflorescence axis (PO:0006324) from the most distal branch point to the tip of the tassel inflorescence (PO:0020126)."
synonym: "first order tassel inflorescence axis length (exact)" EXACT []
is_a: TO:0001072 ! inflorescence axis length
relationship: part_of TO:0000798 ! tassel inflorescence length

id: TO:0000940
name: tassel branch zone length
def: "An inflorescence axis length (TO:0001072) which is the length of the first order tassel inflorescence axis (PO:0006324) where the tassel inflorescence branches (PO:0006323) arise." [PMID:28373892, TO:cooperl]
xref: TO_GIT:272
is_a: TO:0001072 ! inflorescence axis length
relationship: part_of TO:0000798 ! tassel inflorescence length