The study linked on top of the page gives some of the subclades of J2 identified in Sicily, including the percentages for each region.
The overall percentages are :
- J2a4b (M67) = 3.81%
- J2a4b1 (M92) = 1.27%
- J2a4h1a (DYS445-6) = 4.66%
- J2b = 0.85%
- J2b2 (M241) = 4.66%
- Other J2 or J2* = 10.59%
The nomenclature has changed since both articles, so I have updated the subclade names based on the
2009 ISOGG tree.
What is called J2f in the study by Di Giacomo (on FamilyTreeDNA) is now J2a4b. Based on Di Giacomo's study, it looks like J2a4b has a Greek (or Anatolian) connection, rather than a Middle Eastern one. But this is because they do not give results for Lebanon. According to
this other study of haplogroup J, J2a4b (M67) makes up one fifth of all Lebanese J2, and is indeed the only major subclade in Lebanon. It is Georgia and Calabria that have the highest percentage of J2a4b (M67) and J2a4b1 (M92), totalling 15.5%. In comparison Greece has a total of 7.6% for both subclades. Sicily has 2.4% of each, which is very similar to Lebanon, with 2.5% of each.
J2b is associated with the Neolithic spread of agriculture from Northern Greece and the Balkans. Interestingly it is most frequent in western Sicily, especially at the Western tip (Santa Ninfa) where E-V13, R1a and R1b are also very strong. E-V13 is always associated with J2b, so no surprise there. But the correlation with R1a and R1b could mean that J2b and E-V13 arrived together with those haplogroups, maybe directly from Central Europe or northern Italy.
I couldn't find information about J2a4h1a. This leaves over 15% of J2 of uncertain origin based on Di Gaetano's study.
If look at the subclades of J2 over the Mediterranean there are few discernible patterns. There is often more difference inside a same country than between regions. For instance, there is more difference between Crete and Macedonia than between Greece and Lebanon. This may simply be due to the fact that many subclades of J2 already existed before J2 spread from the Near East to Greece and Italy. Geographically isolated places like Crete developed their own subclades over time, but these represent only a tiny fraction of the overall J2. J2a4d (M319) is almost only found in Crete, but only makes up about 5% of the island's population.
J2b is the only subclade that seems to have originated, or at least come to represent a sizeable portion of the population, in Greece, and spread from there to the rest of Europe.