1. Phenology and Floret Development as Affected by the Interaction between Eps-7D and Ppd-D1
- Author
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Simon Griffiths, Priyanka A. Basavaraddi, Roxana Savin, Gustavo A. Slafer, and Stefano Bencivenga
- Subjects
0106 biological sciences ,Photoperiod ,Plant Science ,Biology ,photoperiod ,01 natural sciences ,Article ,earliness per se ,spikelet primordia ,03 medical and health sciences ,Anthesis ,Ecology, Evolution, Behavior and Systematics ,030304 developmental biology ,leaf appearance ,photoperiodism ,0303 health sciences ,Ecology ,Phenology ,Botany ,Earliness per se ,Horticulture ,Leaf appearance ,QK1-989 ,Spikelet primordia ,Spike fertility ,Allelic Status ,spike fertility ,Adaptation ,Leaf number ,010606 plant biology & botany - Abstract
Earliness per se (Eps) genes may play a critical role in further improving wheat adaptation and fine-tuning wheat development to cope with climate change. There are only few studies on the detailed effect of Eps on wheat development and fewer on the interaction of Eps with the environment and other genes determining time to anthesis. Furthermore, it seems relevant to study every newly discovered Eps gene and its probable interactions as the mechanisms and detailed effects of each Eps may be quite different. In the present study, we evaluated NILs differing in the recently identified Eps-7D as well as in Ppd-D1 at three temperature regimes (9, 15 and 18 °C) under short day. The effect of Eps-7D on time to anthesis as well as on its component phases varied both qualitatively and quantitatively depending on the allelic status of Ppd-D1 and temperature, being larger in a photoperiod-sensitive background. A more noticeable effect of Eps-7D (when combined with Ppd-D1b) was realised during the late reproductive phase. Consequently, the final leaf number was not clearly altered by Eps-7D, while floret development of the labile florets (florets 2 and 3 in this case, depending on the particular spikelet) was favoured by the action of the Eps-7D-late allele, increasing the likelihood of particular florets to become fertile, and consequently, improving spike fertility when combined with Ppd-D1b. This research was funded by the Spanish Research Agency (AEI), project AGL2015-69595-R, and the International Wheat Yield Partnership (IWYP), project IWYP25FP.
- Published
- 2021