Table 4. Mean squares and F-test of significance for continuous storage root formation and bulking (CSRFAB), storage root yield (SRY) (tons/ha), storage root number (SRNO), vine yield (VY) (tons/ha), storage root diameter (SRD) (mm), storage root length (SRL) (mm), commercial root number (CRN) and weight (CRW), harvest index (HI) and senescence (SEN) of 130 sweetpotato genotypes from Uganda.
| SOV | d.f. | CSRFAB | SRY | SRNO | VY | SRD | SRL | CRW | CRN | HI | SEN |
|---|---|---|---|---|---|---|---|---|---|---|---|
| S | 1 | 1223.56 ns | 2263.89 ns | 15284.37 ns | 73832.70 ns | 2821.05 ns | 89273.20 ns | 125.34 ns | 4381.50 ns | 383.10 ns | 21.90 ns |
| L | 1 | 243.40 ns | 415.52 ns | 1609.44 ns | 77317.50 ns | 1246.97 ns | 16297.00 ns | 42.99 ns | 0.024 ns | 22744.50 ns | 7.57 ns |
| SL | 1 | 0.037 ns | 906.99 ns | 249.05 ns | 28398.30 * | 4147.13 ns | 9217.60 ns | 92.14 * | 281.46 ns | 1855.40 ns | 9.24 ns |
| SLR | 4 | 13.14 *** | 595.92 *** | 147.08 *** | 3278.10 *** | 1021.48 *** | 4815.60 *** | 7.57 *** | 42.20 *** | 1235.5 *** | 1.65 *** |
| HLin | 1 | 134.56 ns | 5039.56 ns | 661.59 ns | 3801.60 ns | 276.73 ns | 2692.20 ns | 176.72 * | 107.95 ns | 22840.60 ns | 0.01 ns |
| HQ | 1 | 0.037 ns | 310.48 ns | 43.89 ns | 1670.50 ns | 52.76 ns | 34.80 ns | 14.44 ns | 45.44 ns | 60.00 ns | 6.35 ns |
| HC | 1 | 33.212 ns | 270.43 ns | 35.27 ns | 204.70 ns | 0.22 ns | 1170.50 ns | 7.39 ns | 4.39 ns | 4655.80 ns | 8.29 ns |
| SH | 3 | 21.58 ns | 172.93 ns | 203.05 ns | 13015.70 ns | 100.56 ns | 1998.90 ns | 13.28 ns | 11.99 ns | 5152.80 ns | 6.14 ns |
| LH | 3 | 61.12 ns | 1113.99 ns | 1062.79 ns | 1937.90 ns | 4904.45 ns | 34388.40 ns | 3.83 ns | 847.82 ns | 7276.10 ns | 3.55 ns |
| SLH | 3 | 27.55 *** | 242.29 ** | 561.79 *** | 1626.00 ** | 728.56 *** | 6705.80 *** | 17.01 *** | 134.57 *** | 111.8 *** | 2.90 *** |
| E | 129 | 12.26 *** | 262.85 ns | 246.97 *** | 1370.60 * | 503.38 *** | 3801.90 *** | 4.23 *** | 103.32 *** | 2569.60 *** | 2.13 *** |
| HLinE | 129 | 2.73 *** | 71.90 ns | 39.94 *** | 613.30 *** | 96.35 * | 522.20 ** | 1.24 * | 19.72 *** | 269.70 ns | 1.13 ns |
| HQ.E | 129 | 0.99 ns | 38.08 ns | 11.87 ns | 215.40 ns | 39.75 ns | 141.40 ns | 0.81 ns | 7.32 ns | 154.80 ns | 0.46 ns |
| HC.E | 129 | 1.40 ns | 46.53 ns | 17.32 ns | 329.70 ns | 38.37 ns | 192.40 ns | 0.69 ns | 7.78 ns | 183.10 ns | 0.41 ns |
| SE | 129 | 4.98 *** | 175.22 ns | 78.07 *** | 1089.30 ns | 194.50 ** | 1451.00 * | 1.94 ** | 36.73 ** | 1115.90 *** | 1.35 * |
| L.E | 128 | 4.02 * | 177.72 ns | 81.34 *** | 988.80 ns | 189.38 ** | 1263.80 ns | 1.95 ** | 33.26 * | 1009.30 *** | 0.97 *** |
| SLE | 126 | 2.90 *** | 119.02 ns | 45.69 *** | 995.00 *** | 112.38 *** | 1029.10 *** | 1.25 *** | 24.18 *** | 807.70 *** | 0.89 *** |
| SHE | 385 | 1.24 ns | 50.31 * | 15.50 ns | 399.80 ns | 54.21 ns | 289.10 ns | 0.74 ns | 7.79 ns | 202.40 ns | 0.77 *** |
| LHE | 377 | 1.19 ns | 57.48 * | 17.24 ns | 367.00 ns | 72.13 ns | 364.60 * | 0.93 ns | 8.67 ns | 254.50 *** | 0.50 ns |
| SLHE | 331 | 1.44 ns | 52.67 ns | 19.74 * | 363.80 ns | 59.75 ns | 295.50 ns | 0.82 *** | 7.84 ns | 177.40 ns | 0.31 ns |
| Residual | 1983 | 1.36 | 51.05 | 16.32 | 412.50 | 52.54 | 339.60 | 0.45 | 7.35 | 193.4 ns | 0.46 |
Note: SOV = source of variation; df: degrees of freedom; CSRFAB = continuous storage root formation and bulking (scored on a scale of 1 to 9, where 1 = no storage initiation and no bulking, and 9 = high storage root initiation & bulking); SRY = storage root yield; SRNO = storage root number per plant; VY = vine yield; SRD = storage root diameter; SRL = storage root length; CRW = commercial storage root weight; CRN = commercial storage root number; HI = harvest index; SEN: senescence (scored on a scale of 1 to 9, where 1 = no senescence, 9 = severe senescence, and death/drying); S = Season; L = location; H = harvest time; E = genotype; HLin: Harvest time linear; HQ = harvest time squared; HC = harvest time cubic (ie. lack-of-fit); SL = season by location interaction; SLR = season by location by replication interaction; SH = season by harvest time interaction; LH = location by harvest time interaction; SLH = season by location by harvest time interaction; SE = season by genotype interaction; L.E = location by genotype interaction; SLE = season by location by genotype interaction; SHE = season by harvest time by genotype interaction; LHE = location by harvest time by genotype interaction; SLHE = season by location by harvest time by genotype; * = significant at 0.05; ** = significant at 0.01; *** = significant at 0.001; ns = non-significant.