Late Dr. Jai Vir Singh worked on various forage crops and guar as Senior Scientist (Plant Breeding) at CCS Haryana Agricultural University, Hisar. He was engaged in the research work related to guar and forage crops since last 27 years. He has contributed to the development and release of varieties viz., HG-182, HFG-156, HG-258, HG-365, HG-563 and HG 2-20 of guar, HM-65 of Methi and HFWS-55 of Senji. He has published more than 100 research papers in national and international journals of repute. He was one of the authors of the books : ‘Practical Plant Breeding Mannual’, ‘Guar Production and Its Utilization in India’ and ‘Guar’. He was one of the recipients of “Rafi Ahmad Kidwai Memorial Prize for Agricultural Research for the biennium 1982-83”. He visited USA under AHRD Faculty Development Programme and worked on Molecular markers of guar. He was Principal Investigator of two projects funded by NATP and APEDA. He was the Vice- President of “The Indian Arid Legumes Society”, Jodhpur and Editor of “Forage Research” journal.