SAN FRANCISCO -- Boston Children’s Hospital, the nation’s largest pediatric research medical center, disclosed Tuesday that it has struck a partnership with a California diagnostics equipment maker to form a company that will develop tests for pediatric diseases and interpret the results for doctors around the world.

The new company, Claritas Genomics, will be based in Waltham, where Harvard-affiliated Boston Children’s Hospital quietly opened a genetics diagnostic lab two years ago. Boston Children’s Hospital will own a majority stake, while a minority will be owned by its partner, Life Technologies Corp. of Carlsbad, Calif.