  We study the gravitational corrections to the F-term in four-dimensional N=1
U(N) gauge theories with flavors, using the Dijkgraaf-Vafa theory. We derive a
compact formula for the annulus contribution in terms of the prime form on the
matrix model curve. Remarkably, the full R^2 correction can be reproduced as a
special momentum sector of a single c=1 CFT correlator, which closely resembles
that in the bosonization of fermions on Riemann surfaces. The N=2 limit of the
torus contribution agrees with the multi-instanton calculations as well as the
topological A-model result. The planar contributions, on the other hand, have
no counterpart in the topological gauge theories, and we speculate about the
origin of these terms.
