What is the definition of Domesticated Grains?

We will refer to Merriam Webster for this one: 

Definition of domesticated

1: adapted over time (as by selective breeding) from a wild or natural state to life in close association with and to the benefit of humans.

While the seeds of wild wheat readily fall off the plant and scatter, a change in two genes meant that in domesticated wheat, the seeds remained attached to the stalk; it is this trait that enabled humans to harvest wheat.

— Assaf Distelfeld