Table 1. Genotypic and phenotypic information about isogenic lines (IL) and hybrid F1s used to develop F2 seed populations.
| Parental Line or F1a | Genotypea | Segment/Markerb | Pericarp Colorc | Plant Heightd |
|---|---|---|---|---|
| A. ILSD1-2 (EM93-1) | SD1-2SD1-2sd7-1sd7-1sd12sd12 | Recipient | White (rcrc) | Semidwarf (sd1sd1, ~80 cm) |
| B. ILsd1-2 | sd1-2sd1-2sd7-1sd7-1sd12sd12 | ~3000 kb | White (rcrc) | Tall (Sd1Sd1, ~100 cm) |
| C. ILSD7-1 | SD1-2SD1-2SD7-1SD7-1sd12sd12 | ~2 kb | Red (RcRc) | Semidwarf (sd1sd1) |
| D. ILSD12 | SD1-2SD1-2sd7-1sd7-1SD12SD12 | ~200 kb | White (rcrc) | Semidwarf (sd1sd1) |
| F1_SD1-2 (A×B) | SD1-2sd1-2sd7-1sd7-1sd12sd12 | RM315/3602 | White (rcrc) | Tall (Sd1sd1, ~90 cm) |
| F1_SD7-1 (A×C) | SD1-2SD1-2SD7-1sd7-1sd12sd12 | RID12 | Red (Rcrc) | Semidwarf (sd1sd1) |
| F1_SD12 (A×D) | SD1-2SD1-2sd7-1sd7-1SD12sd12 | SD12m13 | White (rcrc) | Semidwarf (sd1sd1) |
| F1_SD7-1SD12 (C×D) | SD1-2SD1-2SD7-1sd7-1SD12sd12 | RID12 and SD12m13 | Red (Rcrc) | Semidwarf (sd1sd1) |
a
EM93-1 was the recipient of single introgression segments from a line of “red” weedy rice in ILs for the SD1-2, SD7-1 or SD12 locus. Upper or lower case letters indicate dormancy-enhancing (SD) or -reducing (sd) alleles at the three loci.
b
Physical lengths of the introgression segments in kilobases or DNA markers selected to tag the loci.
c
Rc, red pericarp color gene, which belongs to the same locus as SD7-1, with the functional allele responsible for both red pigment and enhanced seed dormancy (Gu et al. 2011).
d
sd1, semidwarf1 gene located on the SD1-2-containing region, with the EM93-1−derived allele responsible for both reduced plant height and enhanced seed dormancy (Ye et al. 2013).