Height-reducing variants and selection for short stature in Sardinia

Publication type

Journal Article

Published in

Nature Genetics

Authors

Magdalena Zoledziewska, Carlo Sidore, Charleston W. K. Chiang, Serena Sanna, Antonella Mulas, Maristella Steri, Fabio Busonero, Joseph H. Marcus, Andrea Maschio, Diego Ortega Del Vecchyo, Matteo Floris, Antonella Meloni, Alessandro Delitala, Maria Pina Concas, Federico Murgia, Ginevra Biino, Simona Vaccargiu, Ramaiah Nagaraja, Kirk E. Lohmueller, Nicholas J. Timpson, Nicole Soranzo, Ioanna Tachmazidou, George Dedoussis, Eleftheria Zeggini, Sergio Uzzau, Chris Jones, Robert Lyons, Andrea Angius, Goncalo R. Abecasis, John Novembre, David Schlessinger and Francesco Cucca

Publication date

Summary

We report sequencing-based whole-genome association analyses to evaluate the impact of rare and founder variants on stature in 6,307 individuals on the island of Sardinia. We identify two variants with large effects. One variant, which introduces a stop codon in the GHR gene, is relatively frequent in Sardinia (0.87% versus <0.01% elsewhere) and in the homozygous state causes Laron syndrome involving short stature. We find that this variant reduces height in heterozygotes by an average of 4.2 cm (−0.64 s.d.). The other variant, in the imprinted KCNQ1 gene (minor allele frequency (MAF) = 7.7% in Sardinia versus <1% elsewhere) reduces height by an average of 1.83 cm (−0.31 s.d.) when maternally inherited. Additionally, polygenic scores indicate that known height-decreasing alleles are at systematically higher frequencies in Sardinians than would be expected by genetic drift. The findings are consistent with selection for shorter stature in Sardinia and a suggestive human example of the proposed 'island effect' reducing the size of large mammals.

Volume and page numbers

47, 1352-1356

DOI

http://dx.doi.org/10.1038/ng.3403

ISSN

16

Subjects

Medicine, Science And Technology, Health, Biology and Genetics

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