According to Jared Diamond in Guns, Germs, and Steel, what are the eight prerequisites for turning a wild plant into a domesticate?

The answer
to this question can be found in Chapter 7 of .  There, Diamond describes a
number of criteria that make it more likely that a plant will be domesticated.

The first criterion is size. If a plant has larger fruit, it is likelier to be
domesticated because people will be able to get more food for a given amount of effort as they
picked the food.  The second criterion is taste.  Plants that...