Résume | Let σ1 be the first Steklov eigenvalue on an embedded free boundary minimal surface in B3. We show that an embedded free boundary minimal surface Σg of genus 1 ≤ g ∈ N, one boundary component and dihedral symmetry satisfy σ1(Σg) = 1. In particular, the families constructed by Carlotto-Franz-Schulz and Kapouleas-Wiygul satisfy such condition. |