silkworm_rRNA.gff is the annotation result for silkworm rRNA. All on one line, for example here (with descriptions): ------ scaffold584 blast rRNA 41464 41581 1.6e-29 - . GenePrediction BGIBMRRNAA000001 5S Identity to fruitfly: 88.98 ------ Where: scaffold584: is the id of the genome sequence. blast: is the method rRNA: is the kind of gene. 41464: is the start of the rRNA gene. 41581: is the end of the rRNA gene. 1.6e-29: is the evalue of BLAST. -: is the strand of gene. BGIBMRRNAA000001: is the id of the rRNA gene. 5S Identity to fruitfly: 88.98: is the homology annotation of this rRNA gene.