E-M123 might be the key to understand E-V13, since they probably spread together with the Neolithic Farmers. E-M123* is more common in Iberia, and guess where they found the 7000 year old E-V13, Iberia. A place which makes sense, since early farmers would need mild weather for their primitive agriculture to work.
Here is where E-M123* has been found:
Cruciani et al. (2004) located one individual in Bulgaria after testing 3401 individuals from five continents (of which 116 were Bulgarian), and Underhill et al. (2000) located one individual in Central Asia out of 1062 people tested, including 184 from Central Asia and Siberia.
In a 568 person study in Iberia, Flores et al. (2005) found two E-M123* individuals, both in Northern Portugal out of 109 people tested there.
In a 553 person study of Portugal, Gonçalves et al. (2005) also found two E-M123* individuals in Northern Portugal, out of 101 people, as well as 2 in Madeira out of 129 people tested there.
Flores et al. (2005) found one individual out of 146 Jordanians, this being one of the 101 individuals tested in Amman.
And here is some info on the Iberian neolithic:
In the 6th millennium BC,
Andalusia experiences the arrival of the first agriculturalists. Their origin is uncertain but they arrive with already developed crops (
cereals and
legumes). The presence of domestic animals instead is unlikely, as only
pig[disambiguation needed] and
rabbit remains have been found and these could belong to wild animals. They also consumed large amounts of
olives but it's uncertain too whether this tree was cultivated or merely harvested in its wild form. Their typical artifact is the
La Almagra style pottery, quite variegated.
[4]
The Andalusian Neolithic also influenced other areas, notably Southern Portugal, where, soon after the arrival of agriculture, the first
dolmen tombs begin to be built c. 4800 BC, being possibly the oldest of their kind anywhere.
[4]
C. 4700 BC
Cardium Pottery Neolithic culture (also known as
Mediterranean Neolithic) arrives to Eastern Iberia. While some remains of this culture have been found as far west as Portugal, its distribution is basically Mediterranean (Catalonia, Valencian region, Ebro valley, Balearic islands).
The interior and the northern coastal areas remain largely marginal in this process of spread of
agriculture. In most cases it would only arrive in a very late phase or even already in the Chalcolithic age, together with
Megalithism.