  Mekler constructed a way to produce a pure group from any given structure
where the construction preserves $\kappa$-stability for any cardinal $\kappa$.
Not only the stability, it is known that his construction preserves various
model-theoretic properties such as simplicity, NIP, and NTP$_2$. Inspired by
the last result, we show that the construction also preserves NTP$_1$(NSOP$_2$)
and NSOP$_1$. As a corollary, we obtain that if there is a theory of finite
language which is non-simple NSOP$_1$, or which is NSOP$_2$ but has SOP$_1$,
then there is a pure group theory with the same properties, respectively.
