|Moroccan question marks march across Chalcolithic Western Europe|
So first of all, let me say that the "no selective pressure" conclusion is not what the paper said; that's what I wrote in the title because, even without ancient DNA, there are walls of constraints which are moving in the wrong direction. I pre-concluded it.
We are inundated with a steady drumbeat of crazy selection arguments for T-13910 because this imparts some kind of super-human benefits to its bearers even though it takes only fifteen minutes to separate whey from curd. In order to show rapid selection you'd need to show that the frequency has been increasing steadily over time or has increased through a series of punctuated bottlenecks.
You could have looked at China, Africa or the Middle East to have figured out that it has been a very long time since this adaptation has been under any kind of positive selective pressure.
|Short Horn Cattle|
I have some other stuff to post, hopefully will get to some of it this weekend.
Hunting for the LCT-13910*T Allele between the Middle Neolithic and the Middle Ages Suggests Its Absence in Dairying LBK People Entering the Kuyavia Region in the 8th Millennium BP. Witas HW, Płoszaj T, Jędrychowska-Dańska K, Witas PJ, Masłowska A, et al. (2015) PLoS ONE 10(4): e0122384. doi:10.1371/journal.pone.0122384 [Link]