Final answer:
Early jazz repertory originated from ragtime and blues, which provided the distinct rhythms, styles, and blue notes that characterize the genre.
Step-by-step explanation:
Some of the repertory for early jazz came from ragtime and blues. These were key influences on the development of jazz.
Ragtime, which blended black spirituals with Euro-American folk music, contributed the rhythmic and stylistic foundation that is characteristic of jazz. Blues, which originated in African American communities, contributed the unique chords and "blue" notes that are so distinct in jazz music.
Jazz emerged as a uniquely American music form in places like New Orleans and Chicago and later became international, with hubs of activity in cities like Harlem, known for nightclubs like the Cotton Club where musicians such as Duke Ellington and Cab Calloway performed.