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The beginning of farming by human ancestors is an important event in the whole history of human development, but there is still a lot of unclear about the process of domesticated wild plants into crops in academic circles.
the process may not have much human intervention, according to a study released Thursday by the University of Sheffield.
many crops have been domesticated over a long period of time and are already very different from their wild "close relatives", a change that occurred in the early Farming stages of the Stone Age.
for cereal crops, an important domestication feature is that they lose the ability to spread seeds naturally and rely on human assistance to complete the process.
Colin Osborne, a professor at the University of Sheffield in Theory, says one of the academic debates is whether ancient humans intended to domesticate the plants or simply planted wild plants in the soil, whose domestication properties evolved over time.
, a team led by scholars at Sheffield University analyzed seed data from a variety of major crops.
The seeds of these crops are larger than their wild "close relatives" seeds, such as corn seeds, which are 15 times larger than wild seeds, soybean seeds, which are seven times larger than wild seeds, and wheat, barley and other cereal seeds, which are generally larger than wild seeds, according to their report, published in the British journal Evolutionary Letters.
Osbourne said the evidence showed that seeds from a variety of crops were domesticated and larger, "which means that some major crops themselves have changed significantly in the early planting process, and that this change did not occur as expected by ancient human growers".
, he says, means that unconscious selection may play a bigger role in the process of humans starting to grow crops, and that the increase in early crop yields is likely due to the ability of the crops themselves to evolve in the fields, rather than artificial cultivation.
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