If the LNP did not back Deb Frecklington in her bid to become opposition leader, re-elected Queensland Premier Annastacia Palaszczuk predicted, the conservative party could break apart.

Giving her first press conference after Labor claimed the win in the state election, Ms Palaszczuk delivered her verdict on the LNP's leadership race.

Queensland Premier Annastacia Palaszczuk as she visited Governor Paul de Jersey on Friday. Credit:Jono Searle/AAP

"Far be it for me to comment on the opposition, but if the LNP does not back Deb Frecklington, I fear that the Nationals will break away from the LNP," Ms Palaszczuk said.

"So there's a lot riding on who they select."