Cross-trait assortative mating is widespread and inflates genetic correlation estimates
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Cross-trait assortative mating is widespread and inflates genetic correlation estimates. / Border, Richard; Athanasiadis, Georgios; Buil, Alfonso; Schork, Andrew J.; Cai, Na; Young, Alexander I.; Werge, Thomas; Flint, Jonathan; Kendler, Kenneth S.; Sankararaman, Sriram; Dahl, Andy W.; Zaitlen, Noah A.
In: Science, Vol. 378, No. 6621, 2022, p. 754-761.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Cross-trait assortative mating is widespread and inflates genetic correlation estimates
AU - Border, Richard
AU - Athanasiadis, Georgios
AU - Buil, Alfonso
AU - Schork, Andrew J.
AU - Cai, Na
AU - Young, Alexander I.
AU - Werge, Thomas
AU - Flint, Jonathan
AU - Kendler, Kenneth S.
AU - Sankararaman, Sriram
AU - Dahl, Andy W.
AU - Zaitlen, Noah A.
N1 - Publisher Copyright: © 2022 American Association for the Advancement of Science. All rights reserved.
PY - 2022
Y1 - 2022
N2 - The observation of genetic correlations between disparate human traits has been interpreted as evidence of widespread pleiotropy. Here, we introduce cross-trait assortative mating (xAM) as an alternative explanation. We observe that xAM affects many phenotypes and that phenotypic cross-mate correlation estimates are strongly associated with genetic correlation estimates (R2 = 74%). We demonstrate that existing xAM plausibly accounts for substantial fractions of genetic correlation estimates and that previously reported genetic correlation estimates between some pairs of psychiatric disorders are congruent with xAM alone. Finally, we provide evidence for a history of xAM at the genetic level using cross-trait even/odd chromosome polygenic score correlations. Together, our results demonstrate that previous reports have likely overestimated the true genetic similarity between many phenotypes.
AB - The observation of genetic correlations between disparate human traits has been interpreted as evidence of widespread pleiotropy. Here, we introduce cross-trait assortative mating (xAM) as an alternative explanation. We observe that xAM affects many phenotypes and that phenotypic cross-mate correlation estimates are strongly associated with genetic correlation estimates (R2 = 74%). We demonstrate that existing xAM plausibly accounts for substantial fractions of genetic correlation estimates and that previously reported genetic correlation estimates between some pairs of psychiatric disorders are congruent with xAM alone. Finally, we provide evidence for a history of xAM at the genetic level using cross-trait even/odd chromosome polygenic score correlations. Together, our results demonstrate that previous reports have likely overestimated the true genetic similarity between many phenotypes.
U2 - 10.1126/science.abo2059
DO - 10.1126/science.abo2059
M3 - Journal article
C2 - 36395242
AN - SCOPUS:85142175532
VL - 378
SP - 754
EP - 761
JO - Science
JF - Science
SN - 0036-8075
IS - 6621
ER -
ID: 329613921