silkworm_glean.gff is the annotation result for silkworm genes. All on one line, for example here (with descriptions): ------ nscaf1022 glean mRNA 11153 14469 0.453529 + . GenePrediction BGIBMGA000001-TA ------ Where: nscaf1022: is the id of the genome sequence. glean: is the method mRNA: is the kind of gene. 11153: is the start of the gene. 14469: is the end of the gene. 0.453529: is the score of prediction. +: is the strand of gene. BGIBMGA000001-TA: is the id of the gene.