Phylogeography: English elm is a 2,000-year-old Roman clone

@article{Gil2004PhylogeographyEE,
  title={Phylogeography: English elm is a 2,000-year-old Roman clone},
  author={Luis Gil and Pablo Fuentes-Utrilla and {\'A}lvaro Soto and Mar{\'i}a Teresa Cervera and Carmen Collada},
  journal={Nature},
  year={2004},
  volume={431},
  pages={1053-1053}
}
The outbreak of Dutch elm disease in the 1970s ravaged European elm populations, killing more than 25 million trees in Britain alone; the greatest impact was on Ulmus procera, otherwise known as the English elm. Here we use molecular and historical information to show that this elm derives from a single clone that the Romans transported from Italy to the Iberian peninsula, and from there to Britain, for the purpose of supporting and training vines. Its highly efficient vegetative reproduction… Expand
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