Two comments about the FT ranking:
1) Here's what FT says about the doctoral ranking:
FT doctoral rank
Number of doctoral graduates from the past three years with added weighting for those doctoral graduates taking up faculty positions at one of the top 50 full-time MBA schools. This appears as a rank where the top score is one.
"Added weighting" is good, but we don't know what it is. Otherwise it's a completely useless ranking, since even University of Phoenix online can award doctoral degrees. Since their costs in doing so are low, they can afford to award a bunch of them. If more people want a fake PhD by sending them their resume and a cover letter, then they'll go up in the FT rankings.
2) The FT table you linked to is the EMBA ranking, so clicking on "FT doctoral rank" will rank doctoral programs among schools that _are already ranked in the EMBA table_. This is very important, and the impact is that the results are complete b.s. Fundação Instituto de Administração from Brazil is #6 in the world for its PhD program according to this ranking. By some chance, Wharton is there at the top, but I challenge you to find someone who would rather have a PhD from Copenhagen Business Schools (#2) than from Cornell (#50)... MIT's not on the list because they have no EMBA... I could go on and on!
(However if you do the same thing with the full-time MBA program you'll get better results, but the caveat mentioned in 1 means that you'll still get some very weird stuff going on. The best thing to do is probably take the MBA ranking, whether this one or B-Week, and research further to see what schools are especially good in your area.)