RHt genes were introduced to modern wheat varieties in the 1960s by Norman Borlaug from Norin 10 cultivars of wheat grown in Japan.
It is known from other sources that Pusieux was at the heart of the Xantois region which produced large amounts of farmed wheat at that time: the presence of grain storage facilities at the heart of such a region would therefore not be surprising.
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It is theorized that wheat's ancestors (Triticum monococcum, Aegilops speltoides, and Aegilops tauschii, all diploid grasses) hybridized naturally over millennia somewhere in West Asia, to create natural polyploid hybrids, the best known of which are common wheat and durum wheat.