Y-chromosome polymorphisms are powerful tools in delineating the genetic structure of human populations. A large number of populations in China have been studied in the last several years and 17 Y-chromosome single nucleotide polymorphism (SNP) haplotypes have been found in them, some of which are specific to East Asians. Major ethnic groups tend to have their own characteristic profiles reflected by their respective Y haplotype distribution. Kra–Dai, an ethnic group dispersed from Assam to Taiwan, is a relative homogeneous group, although some resemblance between Kra–Dai and Austronesian groups, especially Taiwanese aborigines, is also noticeable. The haplogroup observed most frequently and regularly among the Kra–Dai-speaking peoples is haplogroup O1b1-K18, which is also the predominant Y-DNA haplogroup among Austroasiatic-speaking peoples and among Austronesian-speaking peoples of Mainland Southeast Asia. Other Y-DNA haplogroups observed frequently in samples of some Kra-Dai-speaking populations include haplogroup O2-M122, which is now widespread throughout southeastern Asia (especially China) and Polynesia, and haplogroup O1a-M119, which is common among western Indonesians, Filipinos, and indigenous peoples of Taiwan; however, the distribution of these latter haplogroups among Kra-Dai speakers is very inhomogeneous, with one study finding haplogroup O2-M122 in 29.2\% (7/24) and haplogroup O1a-M119 in 0\% (0/24) of a sample of Thái people , haplogroup O2-M122 in 23.4\% (11/47) and haplogroup O1a-M119 in 8.5\% (4/47) of a sample of Tày people, and haplogroup O2-M122 in  22.2\% (8/36) and haplogroup O1a-M119 in 47.2\% (17/36)  in  a sample of Lachi people in Vietnam.Enrico Macholdt, Leonardo Arias, Nguyen Thuy Duong, et al., "The paternal and maternal genetic history of Vietnamese populations." European Journal of Human Genetics (2020) 28:636–645. URL
Y-chromosome polymorphisms are powerful tools in delineating the genetic structure of human populations. A large number of populations in China have been studied in the last several years and 17 Y-chromosome single nucleotide polymorphism (SNP) haplotypes have been found in them, some of which are specific to East Asians. Major ethnic groups tend to have their own characteristic profiles reflected by their respective Y haplotype distribution. Kra–Dai, an ethnic group dispersed from Assam to Taiwan, is a relative homogeneous group, although some resemblance between Kra–Dai and Austronesian groups, especially Taiwanese aborigines, is also noticeable. The haplogroup observed most frequently and regularly among the Kra–Dai-speaking peoples is haplogroup O1b1-K18, which is also the predominant Y-DNA haplogroup among Austroasiatic-speaking peoples and among Austronesian-speaking peoples of Mainland Southeast Asia. Other Y-DNA haplogroups observed frequently in samples of some Kra-Dai-speaking populations include haplogroup O2-M122, which is now widespread throughout southeastern Asia (especially China) and Polynesia, and haplogroup O1a-M119, which is common among western Indonesians, Filipinos, and indigenous peoples of Taiwan; however, the distribution of these latter haplogroups among Kra-Dai speakers is very inhomogeneous, with one study finding haplogroup O2-M122 in 29.2\% (7/24) and haplogroup O1a-M119 in 0\% (0/24) of a sample of Thái , haplogroup O2-M122 in 23.4\% (11/47) and haplogroup O1a-M119 in 8.5\% (4/47) of a sample of Tày , haplogroup O2-M122 in 13.5\% (5/37) and haplogroup O1a-M119 in 2.7\% (1/37) of a sample of Nùng, haplogroup O2-M122 in 22.2\% (8/36) and haplogroup O1a-M119 in 47.2\% (17/36) of a sample of La Chí, and haplogroup O2-M122 in 5.9\% (2/34) and haplogroup O1a-M119 in 5.9\% (2/34) of a sample of Cờ Lao in Vietnam.Enrico Macholdt, Leonardo Arias, Nguyen Thuy Duong, et al., "The paternal and maternal genetic history of Vietnamese populations." European Journal of Human Genetics (2020) 28:636–645. URL
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people
R
people, and
,
A
13.5\% (5/37) and haplogroup O1a-M119 in 2.7\% (1/37) of a sample of Nùng, haplogroup O2-M122 in
A
of a sample of La Chí, and haplogroup O2-M122 in 5.9\% (2/34) and haplogroup O1a-M119
A
5.9\% (2/34) of
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Lachi people
Cờ Lao