What song by Merle Haggard was the theme of a TV show?

The TV show "The Dukes of Hazzard" used "Dixie" as its theme song. The song is a southern folk song that originated before the Civil War. It is generally considered to be a patriotic song of the Southern United States, which is why it was chosen for "The Dukes of Hazzard". The song was popularised by Dan Emmett, who wrote and performed the original version. The version used in "The Dukes of Hazzard" was performed by Jerry Reed.