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 purpose of the study of this article is to establish, through DNA analysis, the Y-chromosome haplogroup of an ancient burial found within the location of the famous Nikultsinsky burial ground (Fatyanovo culture) in the Gavrilov-Yamsky district of the Yaroslavl region on the right-bank plateau of the Vondel river. The article describes the archaeological context and the history of the site discovery. The predicted belonging of the individual to the Y-haplogroup R1a and the observed borderline position of the haplotype between the variants R1a-Z280 and R1a-Z93 does not allow rejecting the hypothesis that the described remains belong to the Fatyanovo culture of the Bronze Age III-II thousand BC. At the moment, Y-haplotypes of carriers of the Fatyanovo culture have not yet been cited in scientific articles. Only one work is known in which SNPs of a "high level" were given, which is not enough to identify the genesis and connections of the Fatyanovo culture. In addition, the task of dating and archaeological attribution of the described burial found within the Nikultsinsky burial ground in the zone of its destruction is important. This is due to the fact that the Fatyanovo burials are rare and of high scientific value. The resulting data on the Y-STR haplotype does not contradict the results obtained earlier, and does not allow us rejecting the hypothesis about the Fatyanovo character of this burial.

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).