Table 1.
External standards used for flow cytometry analysis of Urochloa germplasm collection. Chromosome numbers were counted microscopically.
| External Standard | Number of Chromosomes | Mean Fluorescence Values of the Peak Positions | Sample Species |
|---|---|---|---|
| Panicum miliaceum VIR, Mil69 | 2n = 4x = 36 | 112 | - |
| Urochloa brizantha, USDA, PI 292187 | 2n = 4x = 36 | 225 | U. brizantha, U. dura, U. platynota, U. ruziziensis × U. decumbens × U. brizantha hybrid |
| Urochloa decumbens, CIAT, 664 | 2n = 4x = 36 | 205 | U. arrecta, U. decumbens, U. jubata, U. nigropedata, U. plantaginea, U. ruziziensis |
| Urochloa decumbens, CIAT, 6370 | 2n = 4x = 36 | 194 | U. arrecta, U. decumbens, U. jubata, U. nigropedata, U. plantaginea, U. ruziziensis |
| Urochloa humidicola, CIAT, 26151 | 2n = 6x = 36 | 197 | U. humidicola, U. dictyoneura |
| Urochloa maxima, CIAT, 6171 | 2n = 4x = 32 | 131 | U. maxima, U. nigropedata |
| Urochloa maxima, CIAT, 16004 | 2n = 4x = 32 | 120 | U. maxima, U. nigropedata |
| Urochloa maxima, USDA, PI 284156 | 2n = 4x = 32 | 149 | U. maxima, U. nigropedata |
| Urochloa ruziziensis, CIAT, 6419 | 2n = 2x = 18 | 83 | U. arrecta, U. decumbens, U. jubata, U. nigropedata, U. plantaginea, U. ruziziensis |
| Urochloa sp., USDA, PI 657653 | 2n = 4x = 32 | 111 | U. maxima |
United States Department of Agriculture (USDA, USA); Vavilov Research Institute (VIR, St Petersburg, Russia); Centro Internacional de Agricultura Tropical (CIAT, Colombia).