New Neolithic samples from Mentesh-tepe in Azerbaijan are on the road. The paper is not published yet.
Their Y dna is J2b2b relatively close to those found in Hajji Firuz Chl in Iran.
This is a yet another indirect evidence that J2b2 moved from South Caucasus to Steppe. And with Yamna people reached western Balkans where it expanded in Bronze Age.
Genome-wide data for 3 neolithic individuals from Mentesh-Tepe, Azerbaidjan
The South Caucasus is at the outskirt of the Fertile Crescent, one the main centers of Neolithization. Despite this localization, Neolithic developed here only at the beginning of the 6 th millennium, and its origins remains unclear. Here we present genomic data for three new individuals from Mentesh Tepe in Azerbaijan dating back to the beginning of the Shomu-Shulaveri culture. Mentesh Tepe Neolithic population is the product of a recent gene-flow between Anatolian farmer-related population, and Caucasus/Iranian population, demonstrating that population admixture was at the core of the development of agriculture in the South-Caucasus. During the Bronze Age, new gene flows between Pontic Steppe populations and Mentesh Tepe related groups contributed to the make-up of Kura-Araxes and modern Caucasian populations. Genetic analyzes of the Mentesh Tepe Shomu-Shulaveri inhabitants also provide evidence that the two juveniles buried embracing each other were brothers.