Evidence map›Paper›PMID 30895295›Full record

SynthesisGenome biology and evolution2019

A Genome-Wide Association Study of Skin and Iris Pigmentation among Individuals of South Asian Ancestry.

Manjari Jonnalagadda, Muhammad Ashhad Faizan, Shantanu Ozarkar, Richa Ashma, Shaunak Kulkarni, Heather L Norton, Esteban Parra

Open access · goldAbstract readMeta-Analysis
In one paragraph

Synthesis in Genome biology and evolution, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
3.4field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 44 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 4 institutions in 3 countries.

Manjari JonnalagaddaSymbiosis School for Liberal Arts, Symbiosis International (Deemed University), Pune, India.
Muhammad Ashhad FaizanDepartment of Anthropology, University of Toronto, Ontario, Canada.
Shantanu OzarkarDepartment of Anthropology, Savitribai Phule Pune University, India.
Richa AshmaDepartment of Zoology, Savitribai Phule Pune University, India.
Shaunak KulkarniDepartment of Anthropology, Savitribai Phule Pune University, India.
Heather L NortonDepartment of Anthropology, University of Cincinnati.
Esteban ParraDepartment of Anthropology, University of Toronto, Ontario, Canada.
Savitribai Phule Pune University · INUniversity of Toronto · CASymbiosis International University · INUniversity of Cincinnati · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

South Asia has a complex history of migrations and is characterized by substantial pigmentary and genetic diversity. For this reason, it is an ideal region to study the genetic architecture of normal pigmentation variation. Here, we present a meta-analysis of two genome-wide association studies (GWASs) of skin pigmentation using skin reflectance (M-index) as a quantitative phenotype. The meta-analysis includes a sample of individuals of South Asian descent living in Canada (N = 348), and a sample of individuals from two caste and four tribal groups from West Maharashtra, India (N = 480). We also present the first GWAS of iris color in South Asian populations. This GWAS was based on quantitative measures of iris color obtained from high-resolution iris pictures. We identified genome-wide significant associations of variants within the well-known gene SLC24A5, including the nonsynonymous rs1426654 polymorphism, with both skin pigmentation and iris color, highlighting the pleiotropic effects of this gene on pigmentation. Variants in the HERC2 gene (e.g., rs12913832) were also associated with iris color and iris heterochromia. Our study emphasizes the usefulness of quantitative methods to study iris color variation. We also identified novel genome-wide significant associations with skin pigmentation and iris color, but we could not replicate these associations due to the lack of independent samples. It will be critical to expand the number of studies in South Asian populations in order to better understand the genetic variation driving the diversity of skin pigmentation and iris color observed in this region.

Indexed as

Genome, HumanEye ColorGenome-Wide Association StudyHumansIndiaSkin Pigmentationgenome-wide association studyiris colorskin pigmentationSouth Asia

Identifiers

PMID30895295
PMCPMC6456006
OpenAlexW2924438113

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.