RT Journal Article SR Electronic T1 Speciation as a Sieve for Ancestral Polymorphism JF bioRxiv FD Cold Spring Harbor Laboratory SP 155176 DO 10.1101/155176 A1 Guerrero, Rafael F. A1 Hahn, Matthew W. YR 2017 UL http://biorxiv.org/content/early/2017/06/25/155176.abstract AB