Wood Release is a Kekkei Genkai created by mixing Water Release with Earth Release. This Kekkei Genkai is quite rare and hardly ever occurs naturally, which is one of the many reasons why it is coveted. Hashirama Senju, the First Hokage of Konohagakure, is the only person in the series known to possess this Kekkei Genkai naturally.
Wood Release Can Help To Control A Jinchūriki As Displayed By Yamato
One of the many reasons why Konohagakure attempted to recreate Wood Release after the death of Hashirama was for its ability to control a Jinchūriki.
This was seen when Yamato was able to control Naruto Uzumaki to quite an extent by making use of the Wood Release Kekkei Genkai even when it was far inferior to what Hashirama Senju was capable of using.