True potato seed concept was 1^st realized to raise commercial crop in India by . . . . . . . .

The true potato seed concept was 1st realized to raise a commercial crop in India by Dr. S. Ramanujan.
It was first evolved through sexual reproduction by Ramanujam in 1957 and subsequently, its commercial viability was tested. However, the high heterozygosity of seedlings of TPS and uniformity in crop hampered its commercial adoption by farmers.
This technique is used for disease-free seed production. It is the technique for virus-free seed production. The cost of tuber-treating chemicals is also reduced because of the relatively lesser volume of tuberlets.