Fermion masses at intermediate tan : unication of Yukawa

In the context of the Grand Unied MSSM, we investigate the fermion mass matrices at GUT scale. We note that from the experimental mass pattern the determinants of the Yukawa matrices at this scale can be unied with good precision. Taking the unication o determinants as an hypothesis, it gives two model independent predictions that in the MSSM turns out to determine an appropriate value for the product mdms and tan ' 7{10 in the favored range. We then review a predictive model of SU(3) avour in the context of supersymmetric SO(10) that nicely implements this mechanism, while explaining all fermion masses and mixings at 1 level, including neutrino data.