Prior to 2002, there were in academic literature at least seven naming systems for the Y-Chromosome Phylogenetic tree. This led to considerable confusion. In 2002, the major research groups came together and formed the Y-Chromosome Consortium (YCC). They published a joint paper that created a single new tree that all agreed to use. Later, a group of citizen scientists with an interest in population genetics and genetic genealogy formed a working group to create an amateur tree aiming at being above all timely. The table below brings together all of these works at the point of the landmark 2002 YCC Tree. This allows a researcher reviewing older published literature to quickly move between nomenclatures.
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. The International Society of Genetic Genealogy (ISOGG) also provides an amateur tree.
The Genomic Research Center draft tree
This is Thomas Krahn at the Genomic Research Center's Draft tree Proposed Tree for haplogroup E-P177. The first three levels of subclades are shown.
The subclades of Haplogroup E-P177 with their defining mutation(s), according to the 2012 ISOGG tree are provided below. The first three levels of subclades are shown.
^Van Oven M, Van Geystelen A, Kayser M, Decorte R, Larmuseau HD (2014). "Seeing the wood for the trees: a minimal reference phylogeny for the human Y chromosome". Human Mutation. 35 (2): 187–91. doi:10.1002/humu.22468. PMID24166809. S2CID23291764.
^K-M2313*, which as yet has no phylogenetic name, has been documented in two living individuals, who have ethnic ties to India and South East Asia. In addition, K-Y28299, which appears to be a primary branch of K-M2313, has been found in three living individuals from India. See: Poznik op. cit.; YFull YTree v5.08, 2017, "K-M2335", and; PhyloTree, 2017, "Details of the Y-SNP markers included in the minimal Y tree" (Access date of these pages: 9 December 2017)
^ Haplogroup S, as of 2017, is also known as K2b1a. (Previously the name Haplogroup S was assigned to K2b1a4.)
^ Haplogroup M, as of 2017, is also known as K2b1b. (Previously the name Haplogroup M was assigned to K2b1d.)
Underhill, Peter A.; Shen, Peidong; Lin, Alice A.; Jin, Li; et al. (November 2000). "Y chromosome sequence variation and the history of human populations". Nature Genetics. 26 (3): 358–361. doi:10.1038/81685. PMID11062480. S2CID12893406.