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In human mitochondrial genetics, L is the mitochondrial DNA macro-haplogroup that is at the root of the human mtDNA phylogenetic tree. As such, it represents the most ancestral mitochondrial lineage of all currently living modern humans. Macro-haplogroup L's origin is connected with Mitochondrial Eve, and thus, is believed to suggest an ultimate African origin of modern humans. Its major sub-clades include L0, L1, L2, L3, L4, L5 and L6, with all non-Africans exclusively descended from just haplogroup L3. Haplogroup L3 descendants notwithstanding, the designation "haplogroup L" is typically used to designate the family of mtDNA clades that are most frequently found in Sub-Saharan Africa. However, all non-African haplogroups coalesce onto either haplogroup M or haplogroup N, and both these macrohaplogroups are simply sub-branches of haplogroup L3. Consequently, L in its broadest definition is really a paragroup containing all of modern humanity, and all human mitochondrial DNA from around the world are subclades of haplogroup L. Haplogroups M and N are sometimes referred to as haplogroups L3M and L3N respectively. Mitochondrial Eve is defined as the female human ancestor who is the most recent common ancestor of the most deep-rooted lineages of humanity: haplogroups L, L0 and L1-6. }} }} |label2= L1─6 |2= |2 = L4 }} }} }} }} }} }} }} }} == Origin == Studies of human mitochondrial (mt) DNA genomes demonstrate that the root of the human phylogenetic tree occurs in sub-Saharan Africa. The data suggest that Tanzanians have high genetic diversity and possess ancient mtDNA haplogroups, some of which are either rare or absent in other regions of Africa. A large and diverse human population has persisted in eastern Africa and that region may have been an ancient source of dispersion of modern humans both within and outside of Africa.〔 Mitochondrial Eve is the ancestor of this macro-haplogroup and she is estimated to have lived approximately 190,000 years ago.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Macro-haplogroup L (mtDNA)」の詳細全文を読む スポンサード リンク
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