Underhill et al: 20 groups based on Y chromosome

{The following is extracted from the archives, mainly for 195. The referenced article is readily available online at http://www2.smumn.edu/uasal/DNAWWW/pdfs/Underhill2000.pdf
It is well worth reading very closely.
 06:38, 18 Jan 2004 (UTC)}

Here is a summary of a phylogenetic tree based on analysis of the Y chromosomes of 1062 individuals from around the world. The tree comes from . It has 20 population clusters, but only captures 18% of the variation in the haplotypes. (That is, many of the haplotypes are spread in various ways amongst the identified groups. The details are given in a table in the paper.)

Underhill et al did not have adequate data on New Guinea and Australia, and so created a single group for them all. It looks as though they may have missed some interesting areas altogether.

In the following:

    * "X, Y" means X and Y are leaves that are directly joined together;
    * A+B is just the name of a single group. 

The tree has three main lobes (A,B,C):

 A. Sardinia
    Sudan, Ethiopia
 B. America
    Mali
    Khoisan
    S.Africa, C.Africa
    New Guinea/Australia (grouped for lack of data)
    Cambodia+Laos
    Japan
    Taiwan, China
 C. Europe, Basque
    Morocco, Mideast
    C.Asia+Siberia
    Hunza
    Pakistan+India

Peak 09:04, 10 Dec 2003 (UTC) 

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