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Logo of the Y Chromosome Haplotype Reference Database (YHRD) version 4.0. The Y Chromosome Haplotype Reference Database (YHRD) is an open-access, annotated collection of population samples typed for Y chromosomal sequence variants. [1]
There are several confirmed and proposed phylogenetic trees available for haplogroup E-P177. The scientifically accepted one is the Y-Chromosome Consortium (YCC) one published in Karafet et al. (2008) [2] and subsequently updated. A draft tree that shows emerging science is provided by Thomas Krahn at the Genomic Research Center in Houston, Texas.
In human genetics, a human Y-chromosome DNA haplogroup is a haplogroup defined by specific mutations in the non-recombining portions of DNA on the male-specific Y chromosome (Y-DNA). Individuals within a haplogroup share similar numbers of short tandem repeats (STRs) and single-nucleotide polymorphisms (SNPs). [ 2 ]
In the 1980s and 1990s, individual academic research groups each had their own nomenclature for naming Y-Chromosome haplogroups. This created an increasingly unmanageable communication barrier. In 2002, the Y-Chromosome Consortium (YCC) published a widely used proposal to standardize the naming of all Y-Chromosome haplogroups.
Haplogroup C is found in ancient populations on every continent except Africa and is the predominant Y-DNA haplogroup among males belonging to many peoples indigenous to East Asia, Central Asia, Siberia, North America and Australia as well as a some populations in Europe, the Levant, and later Japan.
Data in the table below are based on genetic research. The second column designates linguistic affiliation of the sampled population (Semitic, Nilo-Saharan, Niger-Congo, etc.), the third column gives the total sample size studied, and the other columns indicate the percentage observed of particular haplogroups.