ALFRED: allele frequency database
      The ALlele FREquency Database   
ALFRED is a resource of gene frequency data on human populations
supported by the Yale Center for Medical Informatics.
00ALFRED detailed record information

Population Information

NameALFRED UIDPrimary LanguageLanguage Family
ChenchuPO000294PCHENCHUDravidian

Synonyms:
Geographic Location1:  20N, 76.5E; 13N, 85E  

Sites typed for this population: View List
Population Samples: See Sample Information
External Resources: 
References: See references
Population Description: The Chenchu, a southern Indian cast, lives mostly in the state of Andhra Pradesh in the higher ranges of the Amrabad Plateau in the Nallamali forests. Their language, also Chenchu, belongs to the Dravidian linguistic family (Ethnologue). The Chenchu hold a relatively high cast status and tends to remain segregated from other groups. Even today, this proto-Australoid tribe (Papiha et al. 1997) practices traditional hunting and gathering using either spears or bows and arrows. When food becomes scarce, they migrate to regions where it is more plentiful. The Chenchu social structure is patrilineal where extended families make up the clans. However, the nuclear family is the most basic unit of the society. According to the 1981 census, their population was 28,754 (Ethnologue).
References:
- Papiha SS, Singh BN, Lanchbury JS, Mastana SS, Rao YS. "Genetic study of the tribal populations of Andhra Pradesh, south India". Hum. Biol. 69:171-199. (1997)
Online citation.

- Sastry VNVK. "Chenchu food-gatherers and hunters of Nallamala forests - problems of transition ". Man and life 19:83-96. (1993)

- Vithal CP. "Socio-economic transformation of a primitive tribal group: a study of Chenchus in Andhra Pradesh ". Man in India 72:189-206. (1992)



Sample Information:

Graph estimated heterozygosities for various sites

Sample Name: Chenchu

Sample UID: SA000411G

Sample Description:The Chenchu were collected from the Guntur and Hyderbad districts. With the help from community leaders blood samples were collected from apparently healthy normal, unrelated individuals.

Number of Chromosomes: 206

Relation to Other Samples:

References:
- Papiha SS, Singh BN, Lanchbury JS, Mastana SS, Rao YS. "Genetic study of the tribal populations of Andhra Pradesh, south India". Hum. Biol. 69:171-199. (1997) Online citation.


Sample Information:

Graph estimated heterozygosities for various sites

Sample Name: Chenchu

Sample UID: SA001579W

Sample Description:This sample consists of consenting healthy, unrelated Chenchu individuals from Andhra Pradesh, India.

Number of Chromosomes: 200

Relation to Other Samples:

References:
- Bindu G, Trivedi R, Kashyap V. "Genotypic polymorphisms at seventeen autosomal short tandem repeat Loci in four tribal populations of Andhra Pradesh, India". J Forensic Sci. 50:978-983. (2005) Online citation.


Sample Information:

Graph estimated heterozygosities for various sites

Sample Name: Chenchu

Sample UID: SA003482R

Sample Description:This sample consists of Chenchus from Andra pradesh, India.

Number of Chromosomes: 40

Relation to Other Samples:

References:
- Chaubey G, Metspalu M, Choi Y, Mägi R, Romero IG, Soares P, van Oven M, Behar DM, Rootsi S, Hudjashov G, Mallick CB, Karmin M, Nelis M, Parik J, Reddy AG, Metspalu E, van Driem G, Xue Y, Tyler-Smith C, Thangaraj K, Singh L, Remm M, Richards MB, Lahr MM, Kayser M, Villems R, Kivisild T. "Population Genetic Structure in Indian Austroasiatic speakers: The Role of Landscape Barriers and Sex-specific Admixture". Mol Biol Evol. (Epub ,ahead of print) (2010) Online citation.


Sample Information:

Graph estimated heterozygosities for various sites

Sample Name: Chenchu

Sample UID: SA004505O

Sample Description:This sample consists of Chenchu individuals from Andhra Pradesh. This tribe belongs to the Dravidian linguistic family. This sample consists of Paniya individuals from Kerala. This tribe belongs to the Dravidian linguistic family. This sample is part of the DNA bank of CSIR-Centre for Cellular and Molecular Biology (Hyderabad). The Institutional Ethical Committee of Centre for Cellular and Molecular Biology (Hyderabad) approved the study, and prior permission was also obtained from local authorities.Informed written consent was obtained from each subject.

Number of Chromosomes: 48

Relation to Other Samples:

References:
- Mishra A, Nizammuddin S, Mallick CB, Singh S, Prakash S, Siddiqui NA, Rai N, Carlus SJ, Sudhakar DV, Tripathi VP, Möls M, Kim-Howard X, Dewangan H, Mishra A, Reddy AG, Roy B, Pandey K, Chaubey G, Das P, Nath SK, Singh L, Thangaraj K "Genotype-Phenotype Study of the Middle Gangetic Plain in India Shows Association of rs2470102 with Skin Pigmentation.". J Invest Dermatol. 137:670-677. (2017) Online citation.


1Geographic Coordinates represent two opposite corners of a rectangle encompassing the area where the population lives.This data is preliminary and changing.

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Originally prototyped by Michael Osier with the aid of Kei Cheung
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