It seem it derived most directly from the rythm and blues music on the 1940s.  Do you like any particular singer?
Ive been listening to a lot of rock and roll lately. So you probably know that rock and roll emerged as a defined musical style in the United States in the early to mid 1950s. I thought it would have been the UK. That is really cool.
It derived most directly from the rhythm and blues music of the 1940s, which itself developed from earlier blues, boogie woogie, jazz and swing music, and was also influenced by gospel, country and western, and traditional folk music.