The Speaker announced his decision in the House based on the letters received from Yeddyurappa and state unit BJP leaders, after Governor H R Bhardwaj's customary address to joint session of the state legislature.
Thimappa said he had taken note of the letters and accordingly accepted Yeddyurappa, U B Banakar, Gurupadappa Nagmarpalli and Vishwanath Patil as BJP members following the merger.
Four of the six KJP MLAs had given letters, thereby fulfiling the relevant conditions under the anti-defection law, paving the way for accepting the merger, he said.
The KJP's merger has raised the BJP's tally in the 224-member House to 44, four more than that of JDS, which will now lose the status of principal Opposition with former Chief Minister H D Kumaraswamy as its leader.
The Speaker is expected to accord BJP the status of principal Opposition tomorrow, as the party is yet to announce its leader but in all likelihood it would be former Chief Minister Jagadish Shettar.