The scientifically accepted one is the Y-Chromosome Consortium (YCC) one published in Karafet 2008 and subsequently updated.

A draft tree that shows emerging science is provided by Thomas Krahn at the Genomic Research Center in Houston, Texas.

[web 1] The International Society of Genetic Genealogy (ISOGG) also provides an amateur tree.

[8][7] According to Dr. Spencer Wells, L-M20 originated in the Eurasian K-M9 clan that migrated eastwards from the Middle East, and later southwards from the Pamir Knot into present-day Pakistan and India.

[11][12][13][14][15][16] Genetic studies suggest that L-M20 may be one of the haplogroups of the original creators of the Indus Valley Civilisation.

L-M20 is also observed, although at lower frequencies, in neighbouring countries, such as India, Tajikistan, Uzbekistan and Russia.

[23] Preliminary evidence gleaned from non-scientific sources, such as individuals who have had their Y-chromosomes tested by commercial labs,[web 2] suggests that most European examples of Haplogroup L-M20 might belong to the subclade L2-M317, which is, among South Asian populations, generally the rarest of the subclades of Haplogroup L.[web 2] It has higher frequency among Dravidian castes (ca.

L-M20 is the single largest male lineage (36.8%) among the Jat people of Northern India and is found at 16.33% among the Gujar's of Jammu and Kashmir.

L-M357's highest frequency and diversity is found in the Balochistan province at 28%[23] with a moderate distribution among the general Pakistani population at 11.6%.

[38] It exhibits substantial disparity in its distribution on either side of the Hindu Kush range, with 25% of the northern Afghan Pashtuns belonging to this lineage, compared with only 4.8% of males from the south.

[38] Specifically, paragroup L3*-M357 accounts for the majority of the L-M20 chromosomes among Afghan Pashtuns in both the north (20.5%) and south (4.1%).

[38] An earlier study involving a lesser number of samples had reported that L1c comprises 12.24% of the Afghan Pashtun male lineages.

[39] However L1a-M76 occurs in a much more higher frequency among the Balochs (20[36] to 61.54%),[36] and is found at lower levels in Kyrgyz, Tajik, Uzbek and Turkmen populations.

[42][43][44] An article by O. Semino et al. published in the journal Science (Volume 290, 10 November 2000) reported the detection of the M11-G mutation, which is one of the mutations that defines Haplogroup L, in approximately 1% to 3% of samples from Georgia, Greece, Hungary, Calabria (Italy), and Andalusia (Spain).

The sizes of the samples analyzed in this study were generally quite small, so it is possible that the actual frequency of Haplogroup L-M20 among Mediterranean European populations may be slightly lower or higher than that reported by Semino et al., but there seems to be no study to date that has described more precisely the distribution of Haplogroup L-M20 in Southwest Asia and Europe.

L-M357 is found frequently among Burushos, Kalashas, Brokpa, Jats, Pashtuns, with a moderate distribution among other populations in Pakistan, Georgia,[49] Chechens,[50] Ingushes,[50] northern Iran, India, the UAE, and Saudi Arabia.

[27] A Chinese study published in 2018 found L-M357/L1307 in 7.8% (5/64) of a sample of Loplik Uyghurs from Qarchugha Village, Lopnur County, Xinjiang.

[49] In Caucasia, L-M317 has been found in Mountain Jews (2/10 = 20%[52]), Avars (4/42 = 9.5%,[52] 3%[50]), Balkarians (2/38 = 5.3%),[49] Abkhaz (8/162 = 4.9%,[52] 2/58 = 3.4%[50]), Chamalals (1/27 = 3.7%[52]), Abazins (2/88 = 2.3%[52]), Adyghes (3/154 = 1.9%[52]), Chechens (3/165 = 1.8%[52]), Armenians (1/57 = 1.8%[52]), Lezgins (1/81 = 1.2%[50]), and Ossetes (1/132 = 0.76% North Ossetians,[52] 2/230 = 0.9% Iron[50]).

[53] Some of L-M349's branches are found in West Asia, including L-Y31183 in Lebanon, L-Y31184 in Armenia, and L-Y130640 in Iraq, Iran, Yemen and South Africa.

[45] This percentage is most likely due to a founder effect in their population making them the only group on the African continent with any substantial proportion of L-M20.

L2-L595 is extremely rare, and has been identified by private testing in individuals from Europe and Western Asia.