Table 1.
Phenotypic expression of morphological traits within the studied populations, characterization of variance components and estimation of heritability (h2 BS)
| Population | RIL-S (541 × 2020LM) | RIL-M (S120 × S76) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Trait | Ph | Sl | Sps | Ph | Sl | Sps | Kps | Kw | Tkw | |
|
Parental linesa Mean (SD) |
Maternal | 124.1 (9.7) | 10.7 (0.6) | 34.4 (3.3) | 106.8 (9.7) | 7.8 (1.1) | 26.4 (4.3) | 21.8 (11.1) | 0.41 (0.31) | 17.2 (6.5) |
| Paternal | 68.1 (12.9) | 5.4 (1.6) | 22.7 (6.1) | 89.6 (10.6) | 7.2 (0.9) | 26.5 (2.9) | 29.1 (10.7) | 0.71 (0.35) | 23.8 (5.3) | |
| Mapping population Mean (SD) Variation range | 2008 |
112.0 (14.0) 81.2–141.6 |
8.6 (1.3) 5.5–12.0 |
31.5 (3.8) 22.4–38.0 |
99.0 (11.5) 67.0–125.0 |
8.3 (1.0) 5.9–11.5 |
30.3 (3.2) 18.0–38.8 |
28.0 (10.4) 3.2–51.8 |
0.8 (0.3) 0.08–1.57 |
27.2 (5.2) 15.5–39.3 |
| 2009 |
91.7 (18.8) 41.0–134.8 |
6.9 (1.4) 3.5–10.4 |
24.7 (3.7) 14.0–35.2 |
95.4 (10.4) 58.3–121.5 |
6.9 (0.8) 4.4–9.3 |
24.7 (2.4) 18.7–31.0 |
27.4 (7.1) 8.7–43.8 |
0.7 (0.2) 0.15–1.21 |
23.9 (4.9) 11.4–35.9 |
|
| 2010 |
88.4 (16.2) 54.0–124.2 |
7.4 (1.4) 3.7–11.6 |
25.2 (4.1) 10.7–34.3 |
98.9 (21.6) 42.5–123.3 |
7.6 (1.2) 4.3–11.2 |
26.6 (3.0) 17.3–33.1 |
18.3 (9.2) 1.4–43.4 |
0.4 (0.2) 0.03–1.07 |
20.0 (5.3) 7.5–49.8 |
|
| 2011 |
104.9 (13.1) 80.0–141.3 |
8.2 (1.1) 5.8–10.5 |
28.0 (3.1) 21.1–35.0 |
|||||||
| Correlation coefficient between years of study (min–max) | 0.65–0.86 | 0.63–0.76 | 0.42–0.66 | 0.74–0.81 | 0.59–0.66 | 0.55–0.60 | 0.52–0.60 | 0.53–0.62 | 0.45–0.54 | |
| Components of varianceb (%) | Years (Y) | 29.35* | 17.52* | 28.77* | 1.49 | 22.45* | 33.43* | 17.76* | 27.68* | 29.31* |
| Genotypes (G) | 45.14* | 39.12* | 25.58* | 66.29* | 36.24* | 25.22* | 35.86* | 31.38* | 28.75* | |
| Y × G | 12.50* | 12.72* | 14.10* | 9.40* | 13.39* | 10.95* | 15.67* | 13.25* | 15.09* | |
| h2 BS | 0.45 | 0.39 | 0.26 | 0.66 | 0.36 | 0.25 | 0.36 | 0.31 | 0.29 | |
Ph plant height (cm), Sl spike length (cm), Sps number of spikelets per spike, Kps number of kernels per spike, Kw kernel weight per spike (g), Tkw thousand kernel weight (g)
aSignificant differences between parental lines (based on the Cochran and Cox test) are exhibited by underlined font type
bComponents of variance estimated by the restricted maximum likelihood (REML) method (Holland et al. 2003). Significance of Y, G and Y × G is indicated by asterisks