From Eupedia MtDNA J

The raphic above and text below are from Eupedia.com. There is some excellent information on the site.

https://www.eupedia.com/europe/Haplogroup_J_mtDNA.shtml

"Haplogroup J has been found in Bronze Age samples from the Yamna culture (J2b), Corded Ware culture (J1c and J2b1a), the Catacomb culture (J1b1a1), the Unetice culture (J1b1a1), and the Urnfield culture (J1b1), all in Central Europe. The Corded Ware culture is associated with the expansion of Y-haplogroup R1a from the northern Russian steppe, and in light of the continuity with Neolithic samples from Central Europe it can be assumed that J1c and J2b1a maternal lineages were not brought by the newcomers, but absorbed by the male invaders."

"On the other hand, J1b has never been found in Europe before the Bronze Age and was very probably brought by the Indo-Europeans carrying R1b paternal lineages. Both the Unetice and the Urnfield cultures are thought to have been founded mainly by R1b men. J1b has also been found among African tribes carrying R1b-V88 lineages, which would presume that J1b was one of the original maternal lineages found in R1b populations at least since the Early Neolithic (see R1b history). The absence of J1b in Bronze Age sites associated with the expansion of the R1a branches of the Indo-Europeans (Balto-Slavic and Indo-Iranian) supports that European J1b is exclusively associated with ancient R1b populationJ1b is also very common among non-R1b populations in the Middle East (notably the South Caucasus, Iran and the Arabian peninsula), although the subclades are different. The most common J1b subclade in Europe, and the one most strongly associated with Y-haplogroup R1b, is J1b1, and particularly J1b1a in Europe, which also happen to be the subclade identified in the Urnfield culture. Other subclades of J1b are restricted to the Middle East or the eastern Mediterranean."