Genome-wide association analyses of chronotype in 697, 828 individuals provides insights into circadian rhythms

This paper reports many loci associated with chronotype (i.e. being a ‘morning person’ or ‘evening person’) in a genome-wide association study (GWAS) of 697, 828 participants from the UK Biobank and 23andMe cohorts. The link between chronotype and sleep timing and quality is well known. It was therefore interesting to assess whether these genes were also associated to sleep timing and/or quality.