  Generalized scaling in flavor neutrino masses $M_{ij}$ ($i,j$=$e,\mu,\tau$)
expressed in terms of $\theta_{SC}$ and the atmospheric neutrino mixing angle
$\theta_{23}$ is defined by $M_{i\tau}/M_{i\mu}$ = $- \kappa_it_{23}$
($i$=$e,\mu,\tau$) with $\kappa_e$=1, $\kappa_\mu$=B/A and $\kappa_\tau$=1/B,
where $t_{23}=\tan\theta_{23}$, $A$=${\cos ^2}{\theta_{SC}}+{\sin
^2}{\theta_{SC}}t_{23}^4$ and B=${\cos ^2}{\theta_{SC}}-{\sin
^2}{\theta_{SC}}t_{23}^2$. The generalized scaling ansatz predicts the
vanishing reactor neutrino mixing angle $\theta_{13}=0$. It is shown that the
minimal seesaw mechanism naturally implements our scaling ansatz. There are
textures satisfying the generalized scaling ansatz that yield vanishing baryon
asymmetry of the Universe (BAU). Focusing on these textures, we discuss effects
of $\theta_{13}\neq 0$ to evaluate a CP-violating Dirac phase $\delta$ and BAU
and find that BAU is approximately controlled by the factor
$\sin^2\theta_{13}\sin(2\delta -\phi)$, where $\phi$ stands for the
CP-violating Majorana phase whose magnitude turns out to be at most 0.1.
