The most tomatoes grown on a single stem or “truss” is 1,355 and was achieved by Surjit Singh Kainth (UK) at his home in Coventry, West Midlands, UK, on 11 September 2013.
The plant is called a “Strawberry shaped tomato” and is what’s known as an F1 Tomato Berry variant of the Solanum Lycopersicum (Tomato plant).