Table 8: Variance component for ethanol, cellulose, hemicellulose and lignin content among and within four population sources of switchgrass based on half-sib progeny performance evaluated under 1-cut system at Knoxville, TN (2010-2011).
Sources of variation | ETHPKDM | Cellulose | Hemi | Lignin |
------------------------- Test of fixed effect -------------------------- | ||||
Year | ** | ** | ** | ** |
---------Estimated of variance components ------------------------- | ||||
Source | 3.73 | 0.13 | 0.04 | 0 |
Among HS progenies (HS) | 7.47** | 0.30** | 0.21* | 0 |
Source × year | 0.00 | 0.02 | 0.00 | 0 |
HS × year | 0.00 | 0.01 | 0.06 | 0.12* |
Within HS | 57.73** | 3.82** | 3.47 | 2.50** |
Mean | ||||
Range HS progeny mean | 250-266 | 39.5-42.3 | 34.5-38.5 | 9.2-11.4 |
Range HS progeny mean | 231-274 | 36.2-45.2 | 30.9-41.4 | 5.7-13.4 |
Heritability | 0.26 | 0.40 | 0.26 | 0.400 |
*Significant at 0.05 probability level; **Significant at 0.01 probability level.