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Fig. 1 | BMC Genetics

Fig. 1

From: QTL for spike-layer uniformity and their influence on yield-related traits in wheat

Fig. 1

Biological meaning of spike-layer thickness (SLT), spike-layer number (SLN) and spike-layer uniformity (SLU). SLT indicated the spike layer thickness among inter-tillers; SLN indicated the number of spike layer per SLT; SLU indicated the consistency of the spike distribution in the vertical space. a All tillers per plant have identical tiller height, the SLT was identical to one spike length (SL) (SLT = SL); we can only see one spike layer from the vertical perspective (SLN = 1); all spikes have consistent vertical distribution (SLU = 1). b Most tillers per plant have different tiller height, the SLT was identical to two spike length (SL) (SLT = 2SL); we can see two spike layer from the vertical perspective (SLN = 2); spikes per plant have inconsistent vertical distribution (SLU = 0.5). The variation range of SLU should be from 0 to 1. Clearly, a larger SLU indicates a relative consistent spike vertical distribution

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