DOI: 10.1101/2023.05.22.541772

Genetics of skeletal proportions in two different populations

E.Bartell K. Lin K. Tsuo W. Gan S. Vedantam J. B. Cole J. M. Baronas L. Yengo E. Marouli T. Amariuta GIANT Consortium N. E. Renthal C. M. Jacobsen R. Salem R. G. Walters

E.Bartell K. Lin K. Tsuo ...+12 J. N. Hirschhorn

摘要

Human height can be divided into sitting height and leg length, reflecting growth of different parts of the skeleton whose relative proportions are captured by the ratio of sitting to total height (as sitting height ratio, SHR). Height is a highly heritable trait, and its genetic basis has been well-studied. However, the genetic determinants of skeletal proportion are much less well-characterized. Expanding substantially on past work, we performed a genome-wide association study (GWAS) of SHR in ~450,000 individuals with European ancestry and ~100,000 individuals with East Asian ancestry from the UK and China Kadoorie Biobanks. We identified 565 loci independently associated with SHR, including all genomic regions implicated in prior GWAS in these ancestries. While SHR loci largely overlap height-associated loci (P < 0.001), the fine-mapped SHR signals were often distinct from height. We additionally used fine-mapped signals to identify 36 credible sets with heterogeneous effects across ancestries. Lastly, we used SHR, sitting height, and leg length to identify genetic variation acting on specific body regions rather than on overall human height.

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