Akinlade, who represents Egbado south and Ipokia federal constituency of Ogun, announced his defection to the Allied People’s Movement (APM) at the house of representatives on Thursday.
Three other members of the lower legislative chamber moved to other parties.
They are Rabiu Kaugama from Jigawa who moved from the Peoples Democratic Party (PDP) to the Social Democratic Party (SDP), Salisu Koko from Kebbi who also joined APC but from SDP and Mohammed Ajanah from Kogi who defected from APC to PDP.
Akinlade had lost the governorship ticket of the APC to Dapo Abiodun despite all efforts put in place by Amosun to make him secure it.
Apparently as a result of the crisis in the party, Amosun was the only south-west governor absent when Isiaka Oyetola was sworn in as governor of Osun state on Tuesday.
Akinlade’s defection comes two days after Rochas Okorocha, governor of Imo state, who lost out in his bid to secure APC governorship ticket for Uche Nwosu, his preferred candidate, said he would not stop Nwosu from joining another party.
The Independent National Electoral Commission (INEC) has given parties up till December 1 to substitute candidates for governorship and state houses of assembly elections.