Phenology and Floret Development as Affected by the Interaction between Eps-7D and Ppd-D1
Basavaraddi, Priyanka A.
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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.
Is part ofPlants-Basel, 2021, vol. 10, num. 3, p. 533
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Wheat developmental traits as affected by the interaction between Eps-7D and temperature under contrasting photoperiods with insensitive Ppd-D1 background Basavaraddi, Priyanka A.; Savin, Roxana; Bencivenga, Stefano; Griffiths, Simon; Slafer, Gustavo A. (MDPI, 2021)Earliness per se (Eps) genes are important to fine tune adaptation, and studying their probable pleiotropic effect on wheat yield traits is worthwhile. In addition, it has been shown that some Eps genes interact with ...
Floret development and spike fertility in wheat: Differences between cultivars of contrasting yield potential and their sensitivity to photoperiod and soil N Ferrante, Ariel; Savin, Roxana; Slafer, Gustavo A. (Elsevier, 2020-07-17)In a previous paper (Field Crops Res. 203, 114-127), we showed that the difference in yield potential between a contemporary and a traditional cultivar was due to differences in fruiting efficiency, likely derived from ...
Basavaraddi, Priyanka A.; Savin, Roxana; Wingen, Luzie U.; Bencivenga, Stefano; Przewieslik-Allen, Alexandra M.; Griffiths, Simon; Slafer, Gustavo A. (Springer Nature, 2021)Earliness per se (Eps) genes are reported to be important in fine-tuning flowering time in wheat independently of photoperiod (Ppd) and vernalisation (Vrn). Unlike Ppd and Vrn genes, Eps have relatively small effects and ...