the Wnt
pathway appears to be equivalently activated in male and
female gonads, as the Wnt signaling target gene axin2
displays no sexual dimorphism. Therefore, the fact that
neither wnt4 nor rspo1 are overexpressed in rainbow
trout differentiating ovary may lead us to reconsider the
specific role of the Wnt pathway in early ovarian differentiation
in rainbow trout.