Table 1.
Domestication-related traits examined in F2 and BC1F1 populations of the cross between yardlong bean and wild cowpea (based on Kaga et al., 2008: table 1)
| General attribute | Organ | Trait | Trait abbreviation | QTL/gene | Evaluation method | Evaluated population |
|---|---|---|---|---|---|---|
| Seed dormancy | Seed | Seed coat permeability (%) | SDP | Sdp | Percentage of imbibed seeds at 25 °C in incubator (use 20 seeds) | BC1F1:2/F2:3 |
| Pod dehiscence | Pod | Number of twists (count) | PDT | pdt | Number of twists along the length of the shattered pod | BC1F1 |
| Pod dehiscence | PDD | Pdd | Dehiscence or indehiscence | F2 | ||
| Gigantism | Seed | 100-seed weight (g) | SD100WT | Sd100wt | Weight of 100 seeds (use 100 seeds) | BC1F1:2/F2:3 |
| Length (mm) | SDL | Sdl | Maximum distance from top to bottom of the seed (use 10 seeds) | BC1F1:2/F2:3 | ||
| Width (mm) | SDW | Sdw | Maximum distance from hilum to its opposite side (use 10 seeds) | BC1F1:2/F2:3 | ||
| Thickness (mm) | SDT | Sdt | Maximum distance between both sides of the hilum (use 10 seeds) | BC1F1:2/F2:3 | ||
| Pod | Length (cm) | PDL | Pdl | Length of straight pod (use 10 pods) | BC1F1/F2 | |
| Width (mm) | PDW | Pdw | Maximum width (use 10 pods) measured after soaking in water to flatten the pod to measure | BC1F1/F2 | ||
| Spacing between seeds (mm) | PDSBS* | Pdsbs | Spacing between seeds is calculated by formula: [(PDL*10) – (SDL*SDNPPD)]/SDNPPD | BC1F1/F2 | ||
| Stem | Thickness (mm) | STT | Stt | Stem diameter under the primary leaf (measured at flowering stage) | BC1F1/F2 | |
| Leaf | Primary leaf length (cm) | LFPL | Lfpl | Distance from pulvinus to leaf tip | BC1F1/F2 | |
| Primary leaf width (cm) | LFPW | Lfpw | Maximum width | BC1F1/F2 | ||
| Plant type | Epicotyl | Length (cm) | ECL | Ecl | Length from cotyledon to primary leaf | BC1F1/F2 |
| Stem | Length (up to 10th node) (cm) | STL10 | Stl10 | Length from node on primary leaf to node 10 of trifoliate leaf | BC1F1/F2 | |
| Length (whole) | STLW* | Stlw | Length from node on primary leaf to terminal shoot | BC1F1 | ||
| Branch | Number (count) | BRN | Brn | Number of branches on main stem from node 1 to node 10 of trifoliate leaf (measured at post maturity stage just before discarding) | BC1F1/F2 | |
| Earliness | Flower | Days to first flower (day) | FLD | Fld | Number of days from planting to 1st flowering | BC1F1/F2 |
| Pod | Days to maturity of 1st pod (day) | PDDM | Pddm | Number of days from 1st flowering to harvesting of 1st pod | BC1F1/F2 | |
| Yield potential | Seed | Total weight (g) | SDTWT | Sdtwt | Total weight of harvested seeds | BC1F1/F2 |
| Number of seeds per pod (seeds/pod) | SDNPPD | Sdnppd | Number of seeds per pod | BC1F1/F2 | ||
| Pod | Total number (pod) | PDTN | Pdtn | Total number of harvested pods | BC1F1/F2 | |
| Pigmentation | Epicotyl | Epicotyl colour | ECC | Ecc | Red or green | BC1F1/F2 |
| Seed | Seed coat colour | SDC | Sdc | Black or brown | BC1F1/F2 |
* Not included in Kaga et al. (2008).