Who were the country singing groups in the late 1940s?

In the late 1940s, notable country singing groups included the Sons of the Pioneers, known for their harmonious blend of Western music and cowboy themes, and the Delmore Brothers, who gained popularity for their close harmonies and innovative songwriting. The Blue Sky Boys also emerged during this period, contributing to the evolution of Country Music with their vocal style. Additionally, the Grand Ole Opry showcased various ensembles, helping to popularize group performances in the genre.