| CDT (Controlled seed Deterioration Treatment) | seed longevity | warm/hot air temperature regimen | ratio | 267 | Seed longevity (Renard et. al., 2020) |
| CL | cauline axillary branch number | growth chamber study | count unit | 904 | 1001 Genomes & easyGWAS |
| Ca43 | calcium concentration | growth chamber study | concentration unit | 2702 | Ion Concentration |
| Ca43 | calcium concentration | growth chamber study | concentration unit | 93 | Atwell et. al, Nature 2010 |
| Carotenoid | metabolite content trait | growth chamber study | microgram | 117 | Isoprenoid concentration |
| Cd111 | cadmium concentration | growth chamber study | concentration unit | 2701 | Ion Concentration |
| Cd114 | cadmium concentration | growth chamber study | concentration unit | 93 | Atwell et. al, Nature 2010 |
| Chlorophyll | metabolite content trait | growth chamber study | microgram | 117 | Isoprenoid concentration |
| Chlorosis 10 | leaf chlorosis | growth chamber study | dimensionless unit | 177 | Atwell et. al, Nature 2010 |
| Chlorosis 16 | leaf chlorosis | growth chamber study | dimensionless unit | 176 | Atwell et. al, Nature 2010 |
| Chlorosis 22 | leaf chlorosis | growth chamber study | dimensionless unit | 176 | Atwell et. al, Nature 2010 |
| Co59 | cobalt concentration | growth chamber study | concentration unit | 93 | Atwell et. al, Nature 2010 |
| Co59 | cobalt concentration | growth chamber study | concentration unit | 2698 | Ion Concentration |
| Cu65 | copper concentration | growth chamber study | concentration unit | 2700 | Ion Concentration |
| Cu65 | copper concentration | growth chamber study | concentration unit | 93 | Atwell et. al, Nature 2010 |
| DSDS50 | DSDS50 | growth chamber study | day | 109 | Atwell et. al, Nature 2010 |
| DTF spain 2008 (1st experiment) | days to flowering trait | — | day | 360 | Flowering time in simulated seasons |
| DTF spain 2008 (2nd experiment) | days to flowering trait | — | day | 359 | Flowering time in simulated seasons |
| DTF spain 2009 (1st experiment) | days to flowering trait | — | day | 480 | Flowering time in simulated seasons |
| DTF spain 2009 (2nd experiment) | days to flowering trait | — | day | 480 | Flowering time in simulated seasons |
