TABLE 1.
Reported quantitative trait loci (QTLs) associated with fruit quality traits in watermelon.
| Fruit quality traits | QTL name | Population | PVE (%) | AdE | DomE | Chr | POC (cM) | References |
| Total soluble solutes | brx7.1 | CLL × CLL | 7.30 | 0.27 | − | 7 | 34.5 | Sandlin et al., 2012 |
| brx8.1 | CLL × CLL | 7.00 | –0.26 | − | 8 | 17.9 | Sandlin et al., 2012 | |
| brx9.2 | CLL × CLL | 12.10 | 0.40 | − | 9 | 76.7 | Sandlin et al., 2012 | |
| brx9.1 | CLL × Egusi | 21.60 | 0.65 | 0.03 | 9 | 0 | Sandlin et al., 2012 | |
| Qbrx5-1 | CLL × CLL | 12.40 | 0.37 | − | 5 | 189.6 | Fall et al., 2019 | |
| Qbrx8-2 | CLL × CLL | 13.40 | –0.40 | − | 8 | 0 | Fall et al., 2019 | |
| Qbrix2-1 | CLL × CLL, CLL × CLV, CLL × Egusi | 22.14 | 0.83 | − | 2 | 15.9 | Ren et al., 2014 | |
| Qbrix2-2 | CLL × CLL, CLL × CLV, CLL × Egusi | 28.87 | 0.54 | − | 2 | 73.9 | Ren et al., 2014 | |
| Qbrix6 | CLL × CLL, CLL × CLV, CLL × Egusi | 8.28 | 0.41 | − | 6 | 35.5 | Ren et al., 2014 | |
| BCC2.1 2 | CLL × CLL | 2.72 | 0.40 | 0.27 | 2 | 24.31 | Cheng et al., 2016 | |
| Qbrix8 | CLL × CLL, CLL × CLV, CLL × Egusi | 13.71 | 0.79 | − | 8 | 24.3 | Ren et al., 2014 | |
| BCC8.1 | CLL × CLL | 6.87 | –0.68 | − | 8 | − | Liu et al., 2015 | |
| BCE2.1 | CLL × CLL | 6.14 | –0.52 | − | 1 | − | Liu et al., 2015 | |
| BCE8.1 | CLL × CLL | 5.27 | –0.48 | − | 8 | − | Liu et al., 2015 | |
| Fructose | Qfru5-1 | CLL × CLL | 18.30 | –3.63 | − | 5 | 16.9 | Fall et al., 2019 |
| Qfru5-2 | CLL × CLL | 18.30 | –3.11 | − | 5 | 45.4 | Fall et al., 2019 | |
| Qfru2-1 | CLL × CLL | 25.95 | 3.30 | − | 2 | 17.9 | Ren et al., 2014 | |
| Qfru2-2 | CLL × CLL, CLL × CLV, CLL × Egusi | 24.55 | 2.11 | − | 2 | 75.9 | Ren et al., 2014 | |
| Qfru3 | CLL × CLL, CLL × CLV, CLL × Egusi | 5.86 | 1.12 | − | 3 | 64.7 | Ren et al., 2014 | |
| Qfru6 | CLL × CLL, CLL × CLV, CLL × Egusi | 15.93 | 2.33 | − | 6 | 23.8 | Ren et al., 2014 | |
| Qfru8 | CLL × CLL, CLL × CLV, CLL × Egusi | 14.90 | 3.52 | − | 8 | 25.3 | Ren et al., 2014 | |
| FCE10.1 10 | CLL × CLL | 11.79 | –0.82 | 0.29 | 10 | 116.51 | Cheng et al., 2016 | |
| Glucose | Qglu6 | CLL × CLL, CLL × CLV, CLL × Egusi | 16.71 | 2.51 | − | 6 | 23.8 | Ren et al., 2014 |
| Qglu5-1 | CLL × CLL | 12.80 | –2.67 | − | 5 | 17.9 | Fall et al., 2019 | |
| Qglu5-2 | CLL × CLL | 9.60 | –2.16 | − | 5 | 45.4 | Fall et al., 2019 | |
| Qglu5-3 | CLL × CLL | 11.90 | –2.60 | − | 5 | 66.6 | Fall et al., 2019 | |
| Qglu8-1 | CLL × CLL | 17.40 | 3.01 | − | 8 | 49.6 | Fall et al., 2019 | |
| Qglu8-2 | CLL × CLL | 14.50 | –2.86 | − | 8 | 135.5 | Fall et al., 2019 | |
| GCE1.1 1 | CLL × CLL | 6.49 | 0.29 | -2.39 | 1 | 4.01 | Cheng et al., 2016 | |
| Sucrose | Qsur5-2 | CLL × CLL | 28.30 | 0.02 | 5 | 44.8 | Fall et al., 2019 | |
| Qsur8-1 | CLL × CLL | 8.80 | –0.02 | 8 | 50.6 | Fall et al., 2019 | ||
| Qsur2-1 | CLL × CLL, CLL × CLV, CLL × Egusi | 6.39 | 0.82 | 2 | 15.9 | Ren et al., 2014 | ||
| Qsur2-2 | CLL × CLL, CLL × CLV, CLL × Egusi | 9.65 | 0.76 | 2 | 71.9 | Ren et al., 2014 | ||
| Qsur5 | CLL × CLL, CLL × CLV, CLL × Egusi | 0.54 | 7.97 | 5 | 19.1 | Ren et al., 2014 | ||
| SCE1.1 1 | CLL × CLL | 7.02 | –0.03 | 1.19 | 1 | 19.01 | Cheng et al., 2016 | |
| Lycopene | Qlyc3-1 | CLL × CLL | 18.50 | 0.68 | 3 | 31.8 | Fall et al., 2019 | |
| Qlyc11-1 | CLL × CLL | 9.70 | –0.50 | 11 | 105.2 | Fall et al., 2019 | ||
| FC4.1 | CLL × CLL, CLL × CLV | − | − | 4 | 54 | Zhang et al., 2017 | ||
| Yscr | CLL × CLL | − | − | 6 | − | Li et al., 2020 | ||
| LCYB4.1 | CLL × CLL | 83.50 | 19.79 | 4 | − | Liu et al., 2015 | ||
| β-Carotene | qFC.1 | CLL × CLL | − | − | 1 | 20 | Branham et al., 2017 | |
| Flesh color | FC4.1 | CLL × CLL | 34.68 | –0.01 | 4 | − | Liu et al., 2015 | |
| FC3.1 | CLL × CLL | 2.56 | 0.00 | -0.28 | 3 | − | Liu et al., 2015 | |
| FC6.1 | CLL × CLL | 3.87 | 0.17 | 0.23 | 6 | − | Liu et al., 2015 | |
| FC11.1 | CLL × CLL | 5.16 | –1.06 | 0.27 | 11 | − | Liu et al., 2015 | |
| FCR1 | CLL × CLL | 27.59 | –0.49 | 0.22 | 10 | − | Pei et al., 2021 | |
| FCR2 | CLL × CLL | 28.58 | –0.50 | 0.24 | 10 | − | Pei et al., 2021 | |
| CC | CLL × CLL | 17.27 | –0.01 | 0.00 | 10 | − | Pei et al., 2021 | |
| Citrulline | Qcit1-1 | CLL × CLL | 11.50 | 27.06 | 1 | 67.7 | Fall et al., 2019 | |
| Qcit8-1 | CLL × CLL | 21.40 | 36.01 | 8 | 48.6 | Fall et al., 2019 | ||
| Qcit11-1 | CLL × CLL | 12.90 | –28.16 | 11 | 118.8 | Fall et al., 2019 | ||
| Arginine | Qarg2-1 | CLL × CLL | 15.70 | 11.96 | 2 | 79.7 | Fall et al., 2019 | |
| Qarg5-1 | CLL × CLL | 30.20 | 13.06 | 5 | 189.6 | Fall et al., 2019 | ||
| Rind hardness | RH9 | CLL × CLL | 5.44 | 60.15 | 9 | 257 | Yang et al., 2021 | |
| RH10 | CLL × CLL | 49.11 | –297.56 | 10 | 44 | Yang et al., 2021 | ||
| Rind toughness | RTO10 | CLL × CLL | 10.33 | –0.32 | 10 | 49 | Yang et al., 2021 | |
| Rind thickness | RTH2 | CLL × CLL | 14.74 | –0.20 | 2 | 214 | Yang et al., 2021 |
CLL, Citrullus lanatus var. lanatus; CLV, Citrullus lanatus var. citroides; PVE, phenotypic variation explained; AdE, additive effects; DomE, dominance effect; Chr, chromosome; POC, position of chromosome; cM, centimorgan, –, not available.