Data from: Understanding the spectacular failure of DNA barcoding in willows (Salix): Does this result from a trans-specific selective sweep?

Diana M. Percy, George W. Argus, Quentin C. Cronk, Aron J. Fazekas, Prasad R. Kesanakurti, Kevin S. Burgess, Brian C. Husband, Steven G. Newmaster, Spencer C. H. Barrett, Sean W. Graham & Spencer C.H. Barrett
Willows (Salix: Salicaceae) form a major ecological component of Holarctic floras, and consequently are an obvious target for a DNA-based identification system. We surveyed two to seven plastid genome regions (~3.8 kb; ~3% of the genome) from 71 Salix species across all five subgenera, to assess their performance as DNA barcode markers. Although Salix has a relatively high level of interspecific hybridization, this may not sufficiently explain the near complete failure of barcoding that we...
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