Naturally occurring circadian rhythm variation associated with clock gene loci in Swedish Arabidopsis accessions.

ABSTRACT: Circadian clocks have evolved to resonate with external day and night cycles. However, these entrainment signals are not consistent everywhere and vary with latitude, climate and seasonality. This leads to divergent selection for clocks which are locally adapted. To investigate the genetic basis for this circadian variation, we used a delayed fluorescence imaging assay to screen 191 naturally occurring Swedish Arabidopsis accessions for their circadian phenotypes. We demonstrate that the period length co-varies with both geography and population sub-structure. Several candidate loci linked to period, phase and relative amplitude error (RAE) were revealed by genome-wide association mapping and candidate genes were investigated using TDNA mutants. We show that natural variation in a single n

SUBMITTER: Rees H 

PROVIDER: S-EPMC7986795 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature