Fig 1.
Morphological characteristics of the 4S wheat plant.
A. A normal plant with one spike on one stem. B. A 4S wheat plant. The part to be featured is indicated with a white line. C. Tillers from the axillary buds at the axil of each of three aerial leaves on the elongated internodes. D. An axillary bud at the axil of the flag leaf on the elongated internodes developed directly to a spike is indicated by an arrow in red, and a spikelet meristem advanced to a spike is indicated by an arrow in blue. E. The spike developed from the axil of the flag leaf on the elongated internodes in Fig 1D is exposed after the flag leaf is removed. F. The developing spikes or tillers from the axils of three leaves on the elongated internodes are exposed and indicated by arrows in purple after the aerial leaves are removed. G. Supernumerary spikelets developed from on rachis node are squared in red line. H. The two spikelets on the same rachis node are featured to show that the normal spikelet indicated by a white arrow and the supernumerary spikelet indicated by a yellow arrow reside on the same rachis node. I. A stem with branching shoot. The numbers indicate grains per spike. J. A spike with branching spikes with normal fertility. The numbers indicate grains per spike. K. The seeds from the supernumerary spikes are normal (on the left), and the 2174 seed are shown on the right.
Fig 2.
Histological sections of the 4S wheat.
A. The lateral meristem of the axillary bud at the axil of the flag leaf. B. Featuring the branding stem from the axillary bud at the axil of the flag leaf shown in Fig 2A. C. The spike axis of the 4S wheat. D. The spike axis of 2174 wheat. VB: vascular bundle; PPC: pith parenchymal cell; PC: parenchymal cell.