| http://www.w3.org/ns/prov#value | - In that process, particularly in the 1940s and 1950s, breeders got into a treadmill of putting out new varieties; the rust would respond with a new pathotype in a constant spiral; and the breeder would have to put out yet another new variety - in essence a process of ???man-guided co-evolution in the cereal rusts???.
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