Lebbo' people

The Lebbo' people (also known as the Basap) are part of the indigenous Dayak people of East Kalimantan and North Kalimantan, Indonesia.

Lebbo' people
Regions with significant populations
Borneo:
 Indonesia (East Kalimantan, North Kalimantan)n/a
Languages
Basap language, Indonesian language
Religion
Christianity, Kaharingan

Before the modern era, the Lebbo' people were often hunter-gatherers or horticulturalists.

Most members of the Lebbo' live in the Sangkulirang-Mangkalihat Karst range and speak a variety of the Basap language.[1]

Population genetics

In their full autosomal genome, the Lebbo' harbor both Austronesian-related and Mainland Southeast Asian (=Austroasiatic-related) ancestries, like most ethnic groups in the western part of Insular Southeast Asia. Additionally (and – as of now – uniquely among peoples sampled from Borneo and other parts of western Insular Southeast Asia), they have a significant ancestral compontent related to Papuans.[2][3]

In a small sample of Lebbo' males (15 individuals) the following Y-DNA haplogroups were found: C* (M130) 13.33%, K* (M9) 6.67%, K2 (M526) 13.33%, O1b1a1a1a1a (M88) 33.33%, O1a2 (M50) 26.67%, and O2a1b~ (M164) 6.67%.[4] A previous study found a small percentage of Lebbo' males (two individuals) to be the only known members of the rare C1b1a2a, also known as C-B67.[5] According to a study by the same team of researchers published in 2022, C-B67 also has been found in one individual from Lembata and four individuals from Flores, both of which are islands in East Nusa Tenggara, Indonesia.[6] (The less rare sibling clade C1b1a2b/C-F725 has been found in members of the Murut people in Brunei, Malay people in Singapore, Aeta people in the Philippines, and Han Chinese in China.[5])

The most common Mitochondrial DNA haplogroups found amongst a small sample of 19 Lebbo' individuals were: B4a 21.05%, B5a 15.79%, M20 15.79%, M71a2 15.79%, R9b1a1a 10.53% and E1a 21.05% out of a sample size of 19 Lebbo' people.[4]

Footnotes
  1. Guerreiro, Antonio J. (2015). "The Lebbo' language and culture: A window on Borneo's ancient past" (PDF). In I WayanArka; Ni LuhNyoman Seri Malini; Ida Ayu Made Puspani (eds.). Papers from 12-ICAL, Volume 4. Asia-Pacific linguistics 019 / Studies on Austronesian languages 005. Canberra: The Australian National University. pp. 149–178.
  2. Lipson, Mark; Loh, Po-Ru; Patterson, Nick; Moorjani, Priya; Ko, Ying-Chin; Stoneking, Mark; Berger, Bonnie; Reich, David (19 August 2014). "Reconstructing Austronesian population history in Island Southeast Asia". Nature Communications. 5: 4689. Bibcode:2014NatCo...5.4689L. doi:10.1038/ncomms5689. PMC 4143916. PMID 25137359.
  3. Carlhoff, Selina; Duli, Akin; Nägele, Kathrin; Nur, Muhammad; Skov, Laurits; Sumantri, Iwan; Oktaviana, Adhi Agus; Hakim, Budianto; Burhan, Basran; Syahdar, Fardi Ali; McGahan, David P. (August 2021). "Genome of a middle Holocene hunter-gatherer from Wallacea". Nature. 596 (7873): 543–547. doi:10.1038/s41586-021-03823-6. hdl:10072/407535. ISSN 1476-4687. PMC 8387238. PMID 34433944.
  4. Kusuma, P. et al. Contrasting Linguistic and Genetic Origins of the Asian Source Populations of Malagasy. Sci. Rep. 6, 26066; doi: 10.1038/srep26066 (2016).
  5. Karmin M, Saag L, Vicente M, Wilson Sayres MA, Järve M, Talas UG, et al. (April 2015). "A recent bottleneck of Y chromosome diversity coincides with a global change in culture". Genome Research. 25 (4): 459–66. doi:10.1101/gr.186684.114. PMC 4381518. PMID 25770088.
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