Abstract:
:All common genome-wide association (GWA) methods rely on population structure correction, to avoid false genotype-to-phenotype associations. However, population structure correction is a stringent penalization, which also impedes identification of real associations. Using recent statistical advances, we developed a new GWA method, called Quantitative Trait Cluster Association Test (QTCAT), enabling simultaneous multi-marker associations while considering correlations between markers. With this, QTCAT overcomes the need for population structure correction and also reflects the polygenic nature of complex traits better than single-marker methods. Using simulated data, we show that QTCAT clearly outperforms linear mixed model approaches. Moreover, using QTCAT to reanalyse public human, mouse and Arabidopsis GWA data revealed nearly all known and some previously undetected associations. Following up on the most significant novel association in the Arabidopsis data allowed us to identify a so far unknown component of root growth.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Klasen JR,Barbez E,Meier L,Meinshausen N,Bühlmann P,Koornneef M,Busch W,Schneeberger Kdoi
10.1038/ncomms13299subject
Has Abstractpub_date
2016-11-10 00:00:00pages
13299issn
2041-1723pii
ncomms13299journal_volume
7pub_type
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