Table 1.
Effects of Rht12 on plant height, spike traits and yield components in the F2 progeny.
Table 2.
Seedling vigour of different groups of the F2:3 lines in the autumn-sown (AS) and spring-sown (SS) experiments.
Table 3.
Effects of Rht12 on coleoptile length and root traits of different groups of the F2:3 lines at the seedling stage.
Figure 1.
Seminal root morphology of the dwarf and tall lines at the seedling stage determined by the Cigar method.
Panel A shows the dwarf lines and B shows the tall lines. The tall lines always have two more seminal roots than the dwarf lines (P<0.05).
Figure 2.
Spike development of the tall (rrBB, A1–A3) and dwarf (RRBB, B1–B3) genotypes in the AS experiment.
A1 and B1 show spike development at the early double ridge stage of tall genotypes and at metaphase of single ridge stage of the dwarf genotypes at 630°Cd (75d after sowing), respectively; A2 and B2 show spike development at terminal spikelet initiation stage of the tall genotypes and at anaphase of double ridge stage of the dwarf genotypes at 770°Cd (165d after sowing), respectively; A3 and B3 show the floret morphology at yellow anther stage/anthesis of the tall genotypes and at green anther stage of the dwarf genotypes at 1430°Cd (209d after sowing), respectively. Scale bars = 100 µm.
Table 4.
Duration days (d) and thermal time (°C d) of different pre-anthesis developmental phases of different groups of the F2:3 lines in the autumn-sown (AS) and spring-sown (SS) experiments.
Table 5.
Effects of Rht12 on the spike characters and fertility of different groups of the F2:3 lines in the autumn-sown (AS) and spring-sown (SS) experiments.
Table 6.
Dry weight of spikes and the whole plant at anthesis of different groups of the F2:3 lines in the autumn-sown (AS) and spring-sown (SS) experiments.
Figure 3.
Culm morphology of the four genotypes in the AS and SS experiments.
A: the mature plant morphology of the four genotypes and the two parents in the AS experiment. B: schematic representation of internode elongation patterns of the four genotypes and the two parents in AS experiment. C: Schematic representation of internode elongation patterns of the four genotypes in the SS experiment.
Figure 4.
Development of plant height from the soil surface to the top ligule.
A: AS experiment, the final height is achieved at week 22. B: SS experiment, the final height is achieved at week 16. C: plants at the 7th week in AS experiment, the yellow line shows the site of the top ligule in each genotype and the two parents.
Figure 5.
Dynamic changes in dry weight of different organs in the main shoot after anthesis in the AS experiment.
A: dwarf lines; B: tall lines; C: spike dry weight of the dwarf and tall lines. The main culm comprises 6 internodes, the sixth internode is the peduncle. The leaves are numbered from the flag leaf down on the main stem. RR: dwarf lines; rr: tall lines.
Figure 6.
Dynamic changes in dry weight of different organs in the main shoot in the SS experiment.
A: dwarf lines; B: tall lines; C: spike dry weight of the dwarf and tall lines. The main culm comprises 6 elongated internodes, the sixth internode is the peduncle. The leaves are numbered from the flag leaf down on the main stem. RR: dwarf alleles; rr: tall alleles.
Table 7.
Effects of Rht12 on yield components and harvest index of different groups of the F2:3 lines in the autumn-sown (AS) and spring-sown (SS) experiments.