Tiller production and survival in wheat

Tiller production and survival determine final spike number, and play key roles in grain yield formation in wheat (Triticum aestivum).
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Dynamics of tillering and red/far-red ratio (R:FR) at the base of the canopy in the mapping population of ‘Forno’ and ‘Oberkulmer’.
Dynamics of tillering and red/far-red ratio (R:FR) at the base of the canopy in the mapping population of ‘Forno’ and ‘Oberkulmer’. Full details in Xie et al.

Xie et al. identify the genetic basis of tiller production and survival through a detailed quantitative trait locus (QTL) analysis in a bread wheat × spelt mapping population. In addition to genetic control, a low red:far red ratio (R:FR) is associated with early tillering cessation, few total shoots, high infertile shoot number and shoot abortion. They also determine the trade-offs between fertile shoot number and other yield components. These findings provide a deeper insight into the genetic and environmental determination of tillering dynamics and, in turn, yield potential in wheat.

Reference

Xie, Q., Mayes, S., & Sparkes, D. L. (2015). Optimizing tiller production and survival for grain yield improvement in a bread wheat × spelt mapping population. Annals of Botany, 117(1), 51–66. https://doi.org/10.1093/aob/mcv147


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