The following http://www.worldfamilies.net/surnames/perdue/results links to the latest update of the Perdue/Pardue/Purdue y-DNA Project.
After decades of research on the lines of Richard Perdue who died in Montgomery County, Tennessee in 1811 and whose sons and grandchildren moved into Illinois and Indiana, and unable to effectively connect him to the Richard Perdue in the family of eleven sons of John Pardue who died in 1769 in Bute County, North Carolina, DNA submitted by descendants of Richard demonstrates that Richard belongs to the Appomattox River Pardue/Perdue family and was the very probably Richard the son of John Pardue who died in 1769 in Bute County, North Carolina. Unfortunately, the submitter did not provide a patrilineal history of the line of decent.
Once again, y-DNA testing has narrowed place and names in the search for ancestors and as time continues and the DNA research results become more established, DNA tests will continue to be a valuable research tool!
Genealogy is never done; it is always a work in progress!