Yadav, who hails from Mahendergarh district, joined the JJP in New Delhi in the presence of its leader Chautala.
Sharmila had claimed that the family has been unable to contact her husband for last three days.
Yadav was dismissed in 2017 after he posted a video online complaining about the food served to the troops.
She has sought a high-level inquiry into his disappearance as well as the recent rejection of his plea for voluntary retirement.
"I am a farmer's son and I was here to raise the voices of farmers and jawans," Tej Bahadur Yadav said.
About 17 per cent of the over 6,000 'friends' in Yadav's accounts are from Pakistan.
Yadav's family had expressed desire to meet the DG following which the meeting was arranged.
Tej Bahadur Yadav had posted four videos on social media in January, 2017, that showed him complaining about the unpalatable food at his camp along the Indo-Pakistan border in Jammu and Kashmir.
Tej Bahadur through his plea sought direction to allow him to contest the Lok Sabha election from the Varanasi seat.
Yadav said he wanted to contest the polls to eliminate corruption in the forces.
The PMO has sought a report from the Union home ministry on the complaint by BSF jawan Tej Pratap Yadav.
Yadav has now been shifted from the Line of Control to a nearby battalion in Poonch.
The Comptroller and Auditor General in 2012-13 had made certain observation in a report and 'we are improving it', he said.
Yadav, who came in the limelight with his video on the quality of food being served to the Army, said that post revelations made by him, he is being subjected to torture and that no heed has been paid to the concerns raised by him.
The move by the BSF has not been seen kindly by Yadav's family which alleged that the trooper was being "threatened and tortured mentally".
According to a statement released by the STF, Dubey was being brought to Kanpur from Ujjain for appearance in a local court when the vehicle in which he was coming overturned in front of Kanhaiyalal Hospital on the national highway after a herd of cattle suddenly came in front of it.
The Border Security Force has transferred the Commanding Officer and the deputy of a battalion whose jawan Tej Bahadur Yadav recently alleged that poor quality food was being given to troops posted along the border.
He said he was shocked to know about his dismissal after being earlier asked to prepare pension and retirement documents.
It also directed the BSF to produce before it the investigation report and the steps it has taken with regard to allegations levelled by Yadav.
Yadav had moved the top court challenging the decision of Returning Officer to reject his nomination papers from Varanasi Lok Sabha seat, saying it was intended to "give walkover" to PM Modi.
Alleging misconduct by its permanent workers, labour unions and contract staff, the plant management informed all stakeholders, through a notice, that starting Monday "normal operations" at the plant are being suspended.
'We owe our existence to the men in uniform, and we owe it to them to cleanse the armed forces by driving away every bit of corruption that eats into it,' argues Sudhir Bisht.
A staff court of inquiry found that Tej Bahadur Yadav guilty of making false charges.
The body of 33-year-old soldier from Kerala was recovered near his camp in Deolali Cantonment, Maharashtra.
"Anyone can go any day and anytime to any border outpost of the BSF and ask for food"
Whether his nomination was rightly or wrongly rejected by the Election Commission depends on his eligibility, the court said.
The claim comes close on the heels of a BSF jawan's video who alleged poor quality food was being served to the personnel in 29 Battalion in Poonch.
On the eve of the sixth and penultimate phase of the marathon Uttar Pradesh elections, Rediff.com's Aslam Hunani reports on what's at stake.
If he is mentally-ill, then why was he sent to the border and was put on duty? asks jawan's kin.
The home ministry conveyed to the PMO that there was no shortage of rations at any post in paramilitary forces and quality check is being conducted regularly.
Jeet Singh, the constable, talks about how his colleagues in the force work in the absence of medical facilities or pensions.
The BSF took cognisance of the video and tweeted that an inquiry has been ordered.
'When you meet Rahul Gandhi, you will know he is definitely the right guy to lead this country.'
'In Rajiv Gandhi's time, out of every Re 1 spent by the government only 15 paisa reached the public.' 'At this moment, I cannot say that the entire Re 1 reaches the common man's pocket, but yes, two-thirds of that money definitely reaches the common man.' 'And the rest of the money will also reach soon.'
Taking exception to Health Minister Harsh Vardhan not mentioning the death of healthcare workers due to Covid-19 in his statement in Parliament, the Indian Medical Association has published a list of 382 doctors who died due to the viral disease and demanded that they be treated as "martyrs".