Fig. 4
Spike phenotypes of F1and F2hybrids derived from the crosses ofT. turgidumPI 67339 (shr2),T. durumR-107 (wfzp-A/TtBH-A1) andT. turgidumK-40750 (wfzp-A/TtBH-A1).atod, spikes of the parental lines (a), F1(b) and F2(c,d) hybrids derived from the PI 67339/K-40750 cross.etoh, spikes of the parental lines (e), F1(f) and F2hybrids (g,h) derived from the PI 67339/R-107 cross.candg, F2-spikes, representing different phenotypic classes: false-true ramification (f-tR),turgidumtype of branching (T.t.- branching), ramified spike (RS), horizontal spikelet (HS), standard or WT-spike (WT). D, F2-spike of additive phenotype (left) harboring an extra spikelet (supernumerary spikelet, SS) (middle) and an elongated spikelet of f-tR-type (right) at one rachis node. H, A spike of additive phenotype (right) with the SS and f-tR-type spikelets at one rachis node (left). gl – glumes, l – lemma, pa – palea, asterisks indicate ectopic spikelets