Table 2. Mean winter survival percentage and family-mean broad sense heritability (H2) for five switchgrass populations and five population groups, based on field data from Spring 2014 or 2015 at Arlington and Hancock, WI.
| Spring 2014 | Spring 2015 | |||
|---|---|---|---|---|
| Mean winter Survival | H2a | Mean winter Survival | H2 | |
| % | % | |||
| Liberty (111)b | 36.7 ± 0.7 | 0.24 | 49.3 ± 0.3 | 0.13 |
| WS11L (36) | 19.8 ± 1.1 | NA | 29.4 ± 0.9 | NA |
| WS08L (130) | 37.4 ± 0.9 | 0.72 | 23.1 ± 0.7 | 0.71 |
| WS09L (69) | 5.9 ± 0.5 | 0.62 | 3.1 ± 0.4 | 0.68 |
| Expresso (59) | 0.5 ± 0.1 | 0.87 | 0.2 ± 0.1 | 0.92 |
| All populations (368) | 24.8 ± 1.1 | 0.95 | 24.5 ± 1.1 | 0.93 |
| All Lowland (257) | 19.6 ± 1.4 | 0.99 | 13.8 ± 1.0 | 0.89 |
| Southern Lowland (168) | 5.3 ± 0.8 | 0.98 | 5.6 ± 0.8 | 0.85 |
| Eastern Lowland (89) | 46.5 ± 1.5 | 0.63 | 29.3 ± 1.2 | 0.61 |
a
NA = No heritability estimates due to evaluation of this population at only one location.
b
The number inside the parenthesis represents number of half-sib families.