Enhanced fitness conferred by naturally occurring variation in the circadian clock.
Natural variation in clock parameters is necessary for the circadian clock to contribute to organismal fitness over a broad geographic range. Considerable variation is evident in the period, phase, and amplitude of 150 Arabidopsis accessions, and the period length is correlated with the day length at the latitude of origin, implying the adaptive significance of correctly regulated circadian timing. Quantitative trait loci analysis of recombinant inbred lines indicates that multiple loci interact to determine period, phase, and amplitude. The loss-of-function analysis of each member of the ARABIDOPSIS PSEUDO-RESPONSE REGULATOR family suggests that they are candidates for clock quantitative trait loci.
Michael
Todd P
TP
Dartmouth College, Department of Biological Sciences, Hanover, NH 03755, USA.
Salomé
Patrice A
PA
Yu
Hannah J
HJ
Spencer
Taylor R
TR
Sharp
Emily L
EL
McPeek
Mark A
MA
Alonso
Jose M
JM
Ecker
Joseph R
JR
McClung
C Robertson
CR
D000222:Adaptation, Physiological; D000483:Alleles; D017360:Arabidopsis / Q000235:genetics / Q000502:physiology*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000502:physiology*; D001683:Biological Clocks; D002940:Circadian Rhythm; D004269:DNA, Bacterial; D005583:Fourier Analysis; D017343:Genes, Plant; D014644:Genetic Variation; D008027:Light; D009154:Mutation; D018515:Plant Leaves / Q000502:physiology*; D040641:Quantitative Trait Loci; D012621:Seasons; D012641:Selection, Genetic; D014157:Transcription Factors
C091601:ABI3 protein, Arabidopsis; D029681:Arabidopsis Proteins; D004269:DNA, Bacterial; C036483:T-DNA; D014157:Transcription Factors