Genome-wide identification and expression analysis of the Glutamine synthetase family genes in Zea mays under drought stress

•Water shortage is a global issue and a serious threat to the sustainable agriculture sector.•Genomewide identification of Glutamine synthetase family genes was done in poaceae family using bioinformatics tools and their response under drought condition was checked.•Gene expression analysis further verified the role of Glutamine synthetase family genes under drought stress.