Dynamics of apex and leaf development in barley as affected by <i>PPD-H1</i> alleles in two contrasting <i>PHYC</i> backgrounds under short or long photoperiod.

There was an interaction between NILs and photoperiod on time to flowering: at 12 h photoperiod, Fw was delayed by the action of the ppd-H1 -insensitive allele (although the effect was a nonsignificant trend when the PhyC-l allele was in the background in Exp1, the direct effect of ppd-H1 was still significant when considered across the two PHYC backgrounds; see boxplots in Figure 2A ), while under 24 h photoperiod, the ppd-H1 allele did not significantly delay Fw ( Figures 2B, D ).

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