A recent article, Geographic mosaics and changing rates of cereal domestication, on co-evolution between humans and cereal grains provides some intriguing insights. In co-evolution, each species evolves to adapt to the other in a mutual process of what we call 'domestication.' It has been argued for example, that dogs and humans domesticated each other through presenting and selecting desirable traits and behaviors.
The interesting question to me has to do with how much consciousness (including collective or 'swarm' consciousness--a powerful multiplier of consciousness), is involved in this adaptive transformation. Consciousness is most often regarded as being completely subjective and individual but typical discussions do not consider swarm (and possibly 'crop') consciousness. Concepts of consciousness as an adaptive co-evolutionary process are especially intriguing with regard to the domestication 'effort' made by cereals as a crop plant. Could co-evolution and domestication be explained as a form of conscious environmental synchronicity or entangled process symmetry?
When viewed as a process, domestication may be the 'reason' inferred by evolution and all evolution is essentially co-evolution. See The mathematics of mind-time.