Abstract
Engineered sites for genetic transformation have simplified transgene insertion in Caenorhabditis elegans . These strategies include our split hygromycin system (Stevenson et al. 2020) which allows for integration-specific selection of transgenes. Here we have expanded the split hygromycin selection system to include two additional chromosomal locations, both of which are permissive for germline expression, as well as engineered landing pads in three additional natural isolates. Corresponding guide and empty repair template plasmids are also available for each of these sites.