Catcher in the Rye: Tracing the title?

not a catcher in that form it is about He tells her his fantasy of being “the catcher in the rye,” a person who catches little children as they are about to fall off of a cliff. Phoebe tells him that he has misremembered the poem that he took the image from: Robert Burns’s poem says “if a body meet a body, coming through the rye,” not “catch a body