Fig 1.
Schematic diagram indicating the specific spikelet and grain positions analyzed in detail.
Fertile and sterile spikelets are classified by whether or not there are grains in the spikelets. SS, sterile spikelets (SSN, number of sterile spikelets per spike); FS, fertile spikelets (FSN, number of fertile spikelets per spike); GNS, grain number per spikelet; SGW, single-grain weight; GWS, grain weight per spikelet.
Table 1.
Mean square significance among treatments and interactions for grain yield and its component in winter wheat.
Table 2.
Seed-setting traits of spike and yield components in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’, grown under four different plant densities.
Table 3.
Seed-setting traits of main stem and tiller spikes in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’, grown under four different plant densities.
Fig 2.
Grain number per spikelet at different spikelet positions in two wheat cultivars ‘Wennong6’ (W) and ‘Jimai20’ (J), grown under four different plant densities.
D1, 75 plants m-2; D2, 225 plants m-2; D3, 375 plants m-2; D4, 525 plants m-2.
Table 4.
Fitting equations of grain number per spikelet (y) at different spikelet positions (x) in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’, grown under four different plant densities.
Fig 3.
Distribution of single-grain weight at different spikelet positions in two wheat cultivars, ‘Wennong6’ (W) and ‘Jimai20’ (J), grown under four different plant densities.
D1, 75 plants m-2; D2, 225 plants m-2; D3, 375 plants m-2; D4, 525 plants m-2.
Table 5.
Fitting equations of single-grain weight (y, mg) for a specific grain position at different spikelet positions (x) in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’.
Fig 4.
Distribution of grain weight per spikelet at different spikelet positions in two wheat cultivars, ‘Wennong6’ (W) and ‘Jimai20’ (J), grown under four different plant densities.
D1, 75 plants m-2; D2, 225 plants m-2; D3, 375 plants m-2; D4, 525 plants m-2.
Table 6.
Fitting equations of grain weight per spikelet (y, mg) at different spikelet positions (x) in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’, grown under four different plant densities.
Fig 5.
Distribution of single-grain weight at different spikelet positions in two wheat cultivars, ‘Wennong6’ (W) and ‘Jimai20’ (J), grown under four different plant densities.
D1, 75 plants m-2; D2, 225 plants m-2; D3, 375 plants m-2; D4, 525 plants m-2.
Table 7.
Fitting equations of single-grain weight (y, mg) at different spikelet positions (x) in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’, grown under four different plant densities.
Fig 6.
Relationships between grain weight per spikelet, grain number, and single-grain weight at different spikelet positions in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’.
Fig 7.
Single-grain weight of two-grain (A and B), three-grain (C and D), and four-grain (E) spikelets at different grain positions in two wheat cultivars, ‘Wennong6’ and ‘Jimai20’.