Abstract: The paper describes the results of determining the haplogroups of two ancient burials of the 12th century from the middle reaches of the Klyazma. The data obtained make it possible to determine the Y-haplogroup and mitohaplogroup using the markers identified in the study. The article describes the using of bioinformatics methods and the result obtained. The result with a high probability determines the Y-haplogroup I1-Z58 of burial No. 26 and the mitochondrial haplogroup H1-146C (highly probable, H1m1) of burial No. 25.
This work summarizes the initial stage of research undertaken in 2019-2020, and continued in other works by the team of authors. Some of the results have been published; mitoDNA from burial No. 25 is published for the first time and completes the series of DNA data from the described group of burials from ancient Klyazma settlements, published by the authors earlier.
Modern technologies make it possible to extract DNA and test it using various methods, including determination of the Y-chromosome haplogroup and mitochondrial DNA. The article presents the results of the study conducted in 2019-2020 years. The first evidence of the presence of mitochondrial haplogroup H1-146C (burial No. 25) and Y-haplogroup I1-Z58 (burial No. 26) among the Klyazma population of North-Eastern Russia in the 12th century not only confirms the presence of Y-haplogroup H1 in medieval Russian lands (inhabited descendants of the Eastern Slavs), but also indicates that some genetic unity with the western parts of the Slavic area might exist that time.

Abstract: The study of the Ryazan-Oka culture has been going on for more than 100 years. Its main area is the Middle Pooch, with a significant tendency to dominate in the Volga-Oka interfluve from the first centuries of our era until the 60s of the VII century AD. With some degree of hypotheticism, the Ryazan-Oka center, along with the Old Ladoga, can be considered as one of the points of laying the foundations of the Old Russian statehood. The author's team sets itself the task of clarifying certain issues of the formation of the Ryazan-Oka elite on the basis of the latest DNA data and studying the most important cultural artifacts - the cross-shaped fibulae of elite warriors.The scientific novelty of the research is the combination of the study of objects of material culture with the latest DNA data. The study showed that the genesis of the most important attribute of the Ryazan-Oka elite - cross-shaped fibulae - can be associated with the shores of the Western Baltic and the North Sea (including Scandinavia). DNA data indicate the possible origin of a part of the military elite from the shores of the Baltic and the Northwestern part of the Eastern European Plain. Thus, it is quite legitimate to raise the question of migrations (of population and material culture) to the Ryazan-Oka area from the northwest. The latter could have an East Germanic, Baltic, Early Slavic, Baltic-Finnish linguistic affiliation.

Abstract: PaleoDNA testing is becoming one of the most complex areas of modern biotechnology. Modern technologies make it possible to qualitatively extract DNA and test it by various methods, including the determination of the Y-chromosome haplogroup and mitochondrial DNA.
The paper describes the results of determining the Y-DNA haplogroups of two ancient burial sites of the XII-XIV centuries from the middle course of the Klyazma. The data obtained make it possible to determine the Y-haplogroup by the markers identified in the study. The article describes the technology using bioinformatics methods and the result obtained, which with high probability determines the Y-haplogroups R1a-M458-L1029 and I1-Z58. This work summarizes the initial stage of research undertaken in 2019-2020. The first evidence of the presence of R1a-M458 and I1-Z58 among the Klyazma population of Northeastern Russia in the XII-XIV centuries not only supports the point of view of the presence of Y-haplogroup R1a for all medieval Russian lands (inhabited by descendants of Eastern Slavs), but also hints that a certain genetic unity with the western parts of the area of the Slavs may exist (since the most serious concentrations of R1a-M458 and I1-Z58 are observed in the western part of the Slavic area).