Uniform ripening vs green shoulders
Fruit with the uniform ripening (u/u) mutation vs the normal green shoulders. [photo C.M. Rick]

How The Taste Of Tomatoes Went Bad (And Kept On Going)

This story by NPR's science reporter Dan Charles delves into the the uniform ripening trait, which abolishes the normal green shoulders on immature tomato fruit, and how adoption of this trait in modern breeding may be one factor in the poor flavor of commercial tomatoes.  The gene underlying uniform ripening was discovery by Powell et al (2012).