Table 1. Statistical analysis for Al tolerance traits in six subpopulations (Q).
| Q | N | RNRG 3d | RNRG 5d | VRD | IRG | ||||||||||||||||
| Q1 | 47 | 117.7 | b | c | d | 179.3 | a | 176.8 | a | 171.3 | a | ||||||||||
| Q2 | 58 | 103.9 | b | c | d | e | 106.6 | b | c | d | 132.1 | b | c | 120.9 | b | c | |||||
| Q3 | 23 | 144.3 | a | b | 134.3 | a | b | 153.8 | a | 117.4 | b | c | |||||||||
| Q4 | 43 | 119.4 | b | c | 124.2 | b | c | 99.8 | b | c | d | 132.4 | a | b | |||||||
| Q5 | 54 | 71.6 | e | 72.2 | d | 81.8 | d | 86.7 | c | ||||||||||||
| Q6 | 29 | 196.1 | a | 188.0 | a | 143.8 | a | b | 146.1 | a | b | ||||||||||
Q1, guinea accessions from western Africa and guinea margaritiferum; Q2, caudatum accessions from Africa and group of transplanted caudatum and durra accessions from Lake Chad region; Q3, Lines from Embrapa collection and US; Q4, kafir accessions from southern Africa; Q5, durra, bicolor and caudatum accessions from eastern Africa and Asia; Q6, guinea accessions from southern Africa and Asia.
Statistical analysis for Relative Net Root Growth (RNRG) after 3 and 5 days of Al exposure, Visual Root Damage (VRD) and Induction of Root Growth (IRG) in six sorghum subpopulations. Means followed by the same lower-case letters are not statistically different by the non-parametric least significant difference (lsd) test (P<0.05). N: Number of individuals within each subpopulation.