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The hybrid between Aegilops ovata, a small weed, and the common wheat is of itself sterile, producing no good pollen. But it may be fertilized by the pollen of wheat and then gives rise to a secondary hybrid, which is no other than the Aegilops speltaeformis. This remained constant in Godron's experiments during a number of generations, and has been constant up to the present time.
It is one of the oldest hybrids with a pure and known lineage. The original cross has been repeated by Urban, who found the hybrid race to be constant from the beginning. Another very notorious constant hybrid race is the Aegilops speltaeformis. It has been cultivated in botanic gardens for more than half a century, mostly in annual or biennial generations.
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