UPPL candidate Nirmal Kumar Brahma won the Sidli seat with 95,243 votes defeating his nearest rival Shuddho Kumar Basumatary.
Joyanta Basumatary is contesting Lok Sabha elections for the first time.
Many others will also join the party soon, said Arun Rai.
Pramod Boro's remarks come in the wake of the recent resignation of former deputy chief of the Bodo Territorial Council Chandan Brahma from BPF.
Chandan Brahma is a 3-time Assam cabinet minister and former deputy chief of BTC.
The grand joining programme held at the Fakiragram Public high school ground, was attended by several leaders of the BTR administration.
BTR Chief Pramod Boro accused the BPF of doing nothing for development in the Bodo areas during its 17-year regime
The conference, aimed at catapulting Bodo language, literature, culture, and history to a global platform was held at Gandhi Hindustani Sahitya Sabha in Delhi.
Chief Minister Himanta Biswa Sarma took note of the peace initiatives of the government and said that BTR is completely peaceful now
BTR chief Pramod Boro spoke on key issues in the Bodo heartland during an exclusive chat with Northeast Live