Tassel characteristics and plant height in td1 mutants and normal sibs
| Genotype . | Spikelet density of rachis* . | Spikelet density of branch† . | Single spikelets‡total spikelets . | Stamen number (cm) . | Rachis length§(cm) . | Plant height (cm) . | Leaf number . |
|---|---|---|---|---|---|---|---|
| td1-Ref | 21.0 (4.4; 8) | 6.3 (1.5; 8) | 0.60 (0.39)3¶ | 3.8 (0.6; 3) | 20.1 (1.8;8¶) | 35.9 (5.6; 8) | 15.8 (0.7; 8) |
| N sibs | 13.8 (3.1; 14) | 4.4 (0.9; 14) | 0.01 (0.01) 3 | 3.0 (0.1; 3) | 20.8 (2.9; 14) | 41.8 (5.2; 14) | 18.6 (1.3; 24) |
| td1-glf | 16.2 (2.2; 7) | 5.7 (1.8;7¶) | nd | nd | 16.3 (2.6; 7) | 137.9 (28.5; 7) | 19.0 (0; 6) |
| B73 | 14.1 (2.2; 12) | 5.2 (0.9; 12) | nd | nd | 20.8 (2.8; 12) | 171.8 (25.2; 12) | 21.9 (0.3; 30) |
| Genotype . | Spikelet density of rachis* . | Spikelet density of branch† . | Single spikelets‡total spikelets . | Stamen number (cm) . | Rachis length§(cm) . | Plant height (cm) . | Leaf number . |
|---|---|---|---|---|---|---|---|
| td1-Ref | 21.0 (4.4; 8) | 6.3 (1.5; 8) | 0.60 (0.39)3¶ | 3.8 (0.6; 3) | 20.1 (1.8;8¶) | 35.9 (5.6; 8) | 15.8 (0.7; 8) |
| N sibs | 13.8 (3.1; 14) | 4.4 (0.9; 14) | 0.01 (0.01) 3 | 3.0 (0.1; 3) | 20.8 (2.9; 14) | 41.8 (5.2; 14) | 18.6 (1.3; 24) |
| td1-glf | 16.2 (2.2; 7) | 5.7 (1.8;7¶) | nd | nd | 16.3 (2.6; 7) | 137.9 (28.5; 7) | 19.0 (0; 6) |
| B73 | 14.1 (2.2; 12) | 5.2 (0.9; 12) | nd | nd | 20.8 (2.8; 12) | 171.8 (25.2; 12) | 21.9 (0.3; 30) |
Numbers are mean values, with standard deviations in parentheses, followed by the number of individuals measured. td1-Ref mutants were backcrossed to W22 three times and normal sibs were used for comparison. td1-glf mutants were backcrossed to B73 nine times, B73 was used for comparison. Data were collected from plants grown at Gill Tract, Albany, CA in summer 2003, except that leaf number and plant height were collected from seeds of the same cross, planted in the greenhouse in fall of 2004.
nd, no data.
Number of spikelets per cm on central spike of mature tassel, 4 cm were counted after 2 cm were removed from the tip.
Number of spikelets per cm on lowest tassel branch, 4 cm were counted after 2 cm were removed from the tip.
Ratio of number of single spikelets to number of total spikelets on rachis of mature tassel, 4 cm were counted after 2 cm were removed from the tip.
Length of main spike from the tip to the first long tassel branch.
Values for td1 and normal sibs are significantly different(P<0.05), except for ratio of single spikelets to total spikelets(n=6, P=0.12) and mean rachis length in the td1-Ref/W22 (P=0.49) family and branch spikelet density in the td1-glf/B73 family (P=0.51).