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

Artem Pankin, Chiara Campoli, Xue Dong, Benjamin Kilian, Rajiv Sharma, Axel Himmelbach, Reena Saini, Seth J Davis, Nils Stein, Korbinian Schneeberger, Maria von Korff

Research output: Contribution to journalArticlepeer-review

Abstract

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 non-inductive 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.

Original languageEnglish
Pages (from-to)383-396
JournalHuman Genetics
Volume198
Issue number1
Early online date3 Jul 2014
DOIs
Publication statusPublished - 1 Sept 2014

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Copyright © 2014, The Genetics Society of America.

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