Mapping-by-sequencing identifies HvPHYTOCHROME C as a candidate gene for the early maturity 5 locus modulating the circadian clock and photoperiodic flowering in barley.

Publisher: Oxford University Press Country of Publication: United States NLM ID: 0374636 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1943-2631 (Electronic) Linking ISSN: 00166731 NLM ISO Abbreviation: Genetics Subsets: MEDLINE

Publication: 2021- : [Oxford] : Oxford University Press
Original Publication: Austin, Tex. [etc.]

Quantitative Trait Loci*; Circadian Clocks/*genetics ; Flowers/*genetics ; Hordeum/*genetics ; Phytochrome/*genetics ; Plant Proteins/*genetics; Exome ; Flowers/growth & development ; Genes, Plant ; Hordeum/growth & development ; Hordeum/physiology ; Inbreeding ; Photoperiod ; Physical Chromosome Mapping ; Plant Development/genetics

Phytochromes play an important role in light signaling and photoperiodic control of flowering time in plants. Here we propose that the red/far-red light photoreceptor HvPHYTOCHROME C (HvPHYC), carrying a mutation in a conserved region of the GAF domain, is a candidate underlying the early maturity 5 locus in barley (Hordeum vulgare L.). We fine mapped the gene using a mapping-by-sequencing approach applied on the whole-exome capture data from bulked early flowering segregants derived from a backcross of the Bowman(eam5) introgression line. We demonstrate that eam5 disrupts circadian expression of clock genes. Moreover, it interacts with the major photoperiod response gene Ppd-H1 to accelerate flowering under noninductive short days. Our results suggest that HvPHYC participates in transmission of light signals to the circadian clock and thus modulates light-dependent processes such as photoperiodic regulation of flowering.
(Copyright © 2014 by the Genetics Society of America.)

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Keywords: barley; circadian clock; flowering; photoperiod; phytochrome

0 (Plant Proteins)
11121-56-5 (Phytochrome)

Date Created: 20140706 Date Completed: 20150724 Latest Revision: 20220318

20250114

PMC4174949

10.1534/genetics.114.165613

24996910