Go to plants.ensembl.org and click on the link Tools at the top of the page. Click on BioMart.

Click New. Choose the Ensembl Plants Genes database. Choose the Hordeum vulgare genes dataset.

Click on Filters in the left panel. Expand the GENE section by clicking on the + box. Enter the gene list in the Input external references ID list box. Select Gene stable ID(s) [e.g. AGP50735] from the drop-down menu.

Click on Attributes in the left panel. Select the Homologues attributes page. Expand the ORTHOLOGUES section by clicking on the + box. Select Triticum aestivum gene stable ID.

Click Results.