2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74482We show that the main part of the genus of the preimages of a projective line by a generic holomorphic endomorphism of CP^2 goes to the support of the Green measure.16 pages, paper in french. Final version. To appear in Math. AnnComplex VariablesDynamical Systems32H50; 32U40; 32Q45Un phenomene de concentration de genretext