Table 2.
Genotypic (σ 2g; for multi-population training set, MP) or additive (σ 2a; for individual populations), genotype-by-harvest (σ 2gh), genotype-by-year (σ 2gy), genotype-by-treatment (σ 2gt), genotype-by-site (σ 2gl) and experimental error (σ 2ε) variance components and their associated standard errors (± SE) and R (repeatability; for MP training set) or h 2n (narrow-sense heritability; for individual populations), estimated for HA (g DM per plot) and DTH (number of days after 25 October) traits
| Trait | Training set | Mean | Range | σ 2(g or a) | σ 2gh | σ 2gy | σ 2gt | σ 2gl | σ 2ε | R or h 2n |
|---|---|---|---|---|---|---|---|---|---|---|
| Rua | MP | 25.2 | 13.5–36.8 | 13.6 ± 1.8 | 2.0 ± 0.7 | 19.7 ± 1.6 | – | – | 91.8 ± 1.5 | 0.47 |
| STD | Pop I | 21.2 | 11.8–30.2 | 15.7 ± 3.72 | ns | 10.7 ± 2.67 | – | – | 57.1 ± 2.93 | 0.65 |
| Pop II | 32.2 | 22.9–39.9 | 10.3 ± 2.41 | ns | 8.0 ± 1.95 | – | – | 66.1 ± 2.58 | 0.67 | |
| Pop III | 25.3 | 15.4–36.5 | 15.1 ± 3.07 | ns | 11.7 ± 2.25 | – | – | 77.6 ± 2.85 | 0.60 | |
| Pop IV | 22.1 | 14.9–30.3 | 12.5 ± 3.60 | ns | 10.1 ± 3.45 | – | – | 55.9 ± 4.82 | 0.61 | |
| Pop V | 24.9 | 13.9–37.9 | 26.7 ± 4.95 | ns | 11.5 ± 2.50 | – | – | 73.0 ± 3.17 | 0.73 | |
| Rua | MP | 29.6 | 17.3–48.9 | 30.3 ± 3.2 | ns | 12.0 ± 1.9 | – | – | 101.1 ± 2.1 | 0.67 |
| SEV | Pop I | 26.7 | 15.4–41.1 | 41.4 ± 8.14 | ns | ns | – | – | 94.2 ± 7.29 | 0.84 |
| Pop II | 39.8 | 32.0–52.4 | 21.9 ± 4.10 | ns | ns | – | – | 76.8 ± 4.33 | 0.77 | |
| Pop III | 30.6 | 20.2–41.7 | 30.1 ± 4.94 | ns | ns | – | – | 92.6 ± 4.95 | 0.80 | |
| Pop IV | 26.1 | 16.0–47.0 | 42.7 ± 10 | ns | ns | – | – | 60.6 ± 6.71 | 0.89 | |
| Pop V | 26.1 | 16.1–37.9 | 32.5 ± 5.93 | ns | 6.6 ± 3.03 | – | – | 84.1 ± 5.13 | 0.76 | |
| Aor | MP | 58.9 | 53.0–63.4 | 4.6 ± 2.2 | ns | 11.1 ± 2.8 | – | – | 172.4 ± 3.5 | 0.23 |
| STD | Pop I | 52.2 | 44.6–58.7 | 10.9 ± 4.28 | ns | 8.9 ± 4.14 | – | – | 80.5 ± 5.23 | 0.55 |
| Pop II | 52.4 | 48.0–57.1 | 5.5 ± 2.05 | ns | ns | – | – | 85.7 ± 4.24 | 0.54 | |
| Pop III | 51.4 | 44.6–60.6 | 8.6 ± 3.19 | ns | 12.7 ± 3.76 | – | – | 97.6 ± 4.40 | 0.42 | |
| Pop IV | 54.4 | 49.5–59.2 | 8.1 ± 3.19 | ns | ns | – | – | 103.4 ± 9.50 | 0.59 | |
| Pop V | 57.1 | 49.0–64.4 | 8.0 ± 3.6 | 10.0 ± 4.70 | 11.9 ± 5.00 | – | – | 117.3 ± 6.50 | 0.34 | |
| Aor | MP | 38.4 | 24.0–52.1 | 28.7 ± 3.0 | 10.2 ± 2.2 | ns | – | – | 128.3 ± 2.8 | 0.73 |
| SEV | Pop I | 38.2 | 17.4–53.5 | 63.8 ± 10.25 | 22.1 ± 5.03 | ns | – | – | 75.9 ± 4.82 | 0.85 |
| Pop II | 41.9 | 30.6–54.3 | 35.2 ± 5.60 | 11.6 ± 5.10 | ns | – | – | 101.0 ± 5.20 | 0.79 | |
| Pop III | 39.9 | 23.6–55.4 | 39.0 ± 5.73 | 14.8 ± 3.71 | ns | – | – | 83.0 ± 4.08 | 0.80 | |
| Pop IV | 39.6 | 27.5–49.0 | 25.4 ± 5.26 | ns | ns | – | – | 57.6 ± 5.09 | 0.89 | |
| Pop V | 32.5 | 21.7–46.8 | 45.4 ± 7.24 | 28.2 ± 5.18 | ns | – | – | 85.2 ± 4.59 | 0.76 | |
| Lin | MP | 43.7 | 35.7–52.2 | 10.5 ± 2.0 | ns | 11.4 ± 2.4 | – | – | 124.3 ± 3.0 | 0.45 |
| STD | Pop I | 46.4 | 39.7–51.8 | 11.6 ± 4.43 | ns | 12.0 ± 5.33 | – | – | 83.1 ± 6.77 | 0.52 |
| Pop II | 40.8 | 33.6–45.8 | 12.2 ± 2.95 | ns | ns | – | – | 69.3 ± 4.17 | 0.76 | |
| Pop III | 43.8 | 35.8–52.7 | 9.9 ± 3.05 | ns | 5.8 ± 2.88 | – | – | 71.5 ± 3.95 | 0.59 | |
| Pop IV | – | – | ns | ns | ns | – | – | 63.2 ± 11.19 | – | |
| Pop V | 48.1 | 42.6–54.1 | 12.8 ± 3.68 | ns | 8.3 ± 4.05 | – | – | 78.1 ± 5.10 | 0.60 | |
| Rua | MP | 28.2 | 16.2–42.5 | 14.3 ± 2.0 | ns | 11.6 ± 1.1 | 11.7 ± 1.3 | – | 98.3 ± 2.2 | 0.50 |
| STD + SEV | Pop I | 23.5 | 12.7–33.4 | 12.5 ± 4.20 | ns | ns | 16.0 ± 3.80 | – | 81.7 ± 3.20 | 0.54 |
| Pop II | – | – | ns | ns | 2.8 ± 1.21 | 18.6 ± 3.63 | – | 82.0 ± 2.50 | – | |
| Pop III | 28.1 | 18.1–40.3 | 16.3 ± 3.22 | ns | 4.3 ± 1.40 | 5.7 ± 1.74 | – | 96.1 ± 2.73 | 0.68 | |
| Pop IV | – | – | ns | ns | 2.9 ± 1.91 | 37.5 ± 8.02 | – | 71.9 ± 3.41 | – | |
| Pop V | 26.8 | 16.6–38.9 | 17.0 ± 4.93 | ns | 4.9 ± 1.64 | 19.6 ± 3.94 | – | 92.9 ± 3.03 | 0.53 | |
| Comb | MP | – | – | ns | 3.1 ± 0.6 | 11.4 ± 1.0 | – | 22.7 ± 1.6 | 119.8 ± 1.3 | – |
| STD | Pop I | 35.3 | 27.9–42.2 | 4.9 ± 2.19 | ns | 4.1 ± 1.46 | – | 11.2 ± 2.28 | 77.9 ± 2.79 | 0.40 |
| Pop II | 37.0 | 32.6–42.5 | 2.9 ± 1.35 | ns | 2.9 ± 0.97 | – | 7.6 ± 1.46 | 73.4 ± 2.02 | 0.35 | |
| Pop III | 37.8 | 32.7–43.1 | 4.2 ± 1.61 | ns | ns | – | 9.3 ± 2.01 | 167.6 ± 3.82 | 0.40 | |
| Pop IV | – | – | ns | ns | 4.5 ± 2.18 | – | 12.0 ± 3.15 | 75.1 ± 4.11 | – | |
| Pop V | 38.5 | 31.7–46.8 | 8.6 ± 2.65 | ns | 5.1 ± 1.42 | – | 10.7 ± 2.02 | 84.6 ± 2.50 | 0.53 | |
| Comb | MP | 33.0 | 21.0–45.4 | 13.5 ± 2.4 | 2.6 ± 0.8 | 2.7 ± 1.0 | – | 20.0 ± 2.1 | 117.3 ± 1.72 | 0.47 |
| SEV | Pop I | 32.4 | 18.2–43.6 | 29.1 ± 7.62 | ns | ns | – | 24.2 ± 5.93 | 107.2 ± 5.14 | 0.66 |
| Pop II | 38.5 | 30.5–47.9 | 10.8 ± 3.44 | ns | ns | – | 12.7 ± 3.44 | 126.2 ± 3.42 | 0.52 | |
| Pop III | 33.3 | 24.6–41.3 | 33.3 ± 4.31 | ns | ns | – | 14.7 ± 3.63 | 133.0 ± 4.53 | 0.75 | |
| Pop IV | 33.0 | 26.7–41.5 | 14.1 ± 5.22 | ns | ns | – | 7.6 ± 3.20 | 132.8 ± 7.70 | 0.65 | |
| Pop V | 28.5 | 19.0–40.0 | 20.0 ± 4.6 | ns | ns | – | 11.1 ± 3.12 | 100.4 ± 3.82 | 0.71 | |
| Comb | MP | – | – | ns | 0.8 ± 0.3 | 5.5 ± 0.6 | 11.5 ± 1.0 | 19.9 ± 1.3 | 124.4 ± 1.1 | – |
| STD + SEV | Pop I | 35.8 | 24.9–44.6 | 7.6 ± 3.32 | ns | 2.0 ± 0.93 | 14.8 ± 2.8 | 11.9 ± 2.25 | 79.4 ± 2.30 | 0.37 |
| Pop II | ||||||||||
| Pop III | 35.7 | 29.4–41.6 | 4.8 ± 1.78 | ns | 2.0 ± 0.70 | 4.9 ± 1.21 | 9.4 ± 1.46 | 89.6 ± 1.80 | 0.39 | |
| Pop IV | – | – | ns | ns | 2.3 ± 1.31 | 8.2 ± 2.30 | 8.4 ± 2.25 | 71.6 ± 3.05 | – | |
| Pop V | 36.6 | 28.9–45.0 | 10.0 ± 2.73 | ns | 2.5 ± 0.86 | 6.3 ± 1.48 | 8.5 ± 1.58 | 85.8 ± 2.00 | 0.55 | |
| Comb | MP | 16.2 | 11.1–21.2 | 6.1 ± 0.8 | – | – | – | 0.2 ± 0.02 | 18.5 ± 0.7 | 0.66 |
| DTH | Pop I | – | – | ns | – | – | – | 5.2 ± 1.97 | 12.8 ± 1.59 | – |
| Pop II | 17.0 | 10.6–22.0 | 6.0 ± 1.26 | – | – | – | 1.7 ± 0.78 | 8.3 ± 0.77 | 0.73 | |
| Pop III | 16.7 | 12.5–21.6 | 4.4 ± 1.27 | – | – | – | ns | 17.1 ± 1.34 | 0.61 | |
| Pop IV | 16.7 | 6.9–17.3 | 13.3 ± 3.71 | – | – | – | ns | 21.6 ± 4.08 | 0.79 | |
| Pop V | 24.2 | 21.1–26.6 | 2.3 ± 1.12 | – | – | – | ns | 17.3 ± 1.71 | 0.44 |
ns indicates a variance component was recorded but was not statistically significant (P > 0.05). Results are given for analysis of populations as a MP training set and as individual populations (Pop I–V). Where there was no significant (P > 0.05) σ (g or a)2 for a training set, results are not shown (including all training sets for the trait Aor STD + SEV)
STD standard grazing management, SEV severe summer grazing management, Comb data combined across locations and/or treatments