In tomatoes antifreeze gene has been transferred from

In tomatoes, the anti-freeze gene has been transferred from Fish. The tomato gained the moniker 'fish tomato'. The anti-freeze protein was found to inhibit ice recrystallization.
Other genes from various species have been inserted into the tomato with the hope of increasing their resistance to various environmental factors.
A genetically modified tomato or transgenic tomato is a tomato that has had its genes modified, using genetic engineering.