According to Guns, Germs, and Steel, why was wheat one of the first plants to be domesticated, some 10,000 years ago, while straweerries were only...

The answer
to this question can be found in Chapter 7.  It can be found on p. 124 and on p. 129 in the
paperback edition of the book.

On p. 124, Diamond tells us why wheat was
easily domesticated.  He says that wheat, in the wild, is already edible.  It already grows in
large patches that can yield usable amounts of grain.  It is easy to plant and it
pollinates...