How to do Functional Annotation for Wheat

I Analysed wheat Transcriptome,
Ref_Genome: IWGSC ref genome and GFF
The result Gene ID looks like

TraesCS4A03G1003100
TraesCS3A03G0358300
TraesCS2B03G1298100
TraesCS2B03G1298100
TraesCS2A03G0291000
TraesCS2A03G0291000
TraesCS2A03G0291000

I tried in Ensemble Plant and get some useful annotation. However, how I do GO functional annotation? I tried in DAVID and few other web tools but non recognize these Gene IDs. Any suggestion will help a lot.