We have sequenced a eukaryotic genome (~32Mb size) and submitted the assembly sequences (chromosomes) to NCBI. Now while performing annotation of the assembly, first we used MAKER to generate gff3 file of the chromosome. Next, to generate .SQN file (for submitting the annotation to NCBI), we used NCBI Genome Workbench software. The Genome Workbench generates .SQN file, but it does not incorporate the features (i.e., genes, cds, exon etc. from the gff3 file) into the resultant SQN file, resulting in a malformed or annotation-less SQN file.
Can anyone please suggest the possible reason and solution of it.
Thanks