Table 1 Overview of major SPS QTLs in the 4-parent CSIRO and the 8-parent NIAB MAGIC populations and the underlying candidate genes. QTLs for SPS from 12 trials with the 4-parent CSIRO MAGIC population and two trials with the 8-parent NIAB population. QTL analyses were conducted using whole genome average interval mapping using MPWGAIM33. For the NIAB MAGIC population a genetic map adapted from Gardner et al., 201634 was used. For the CSIRO MAGIC population a previously published map was used33. Genetic variance (%) and significance (-log10(p)) as calculated by MPWGAIM33. *The QTL likely associated with VRN-A1 was only observed in the CSIRO Greenhouse studies, where vernalization did not occur. $Inferred from reported VRN-B3 allele. Variety abbreviations: Baxter (B), Chara (C), S (Soissons), W (Westonia), Y (Yitpi).
From: Overexpression of the WAPO-A1 gene increases the number of spikelets per spike in bread wheat
Chr | Genetic region (cM) | Genetic Variance (%) | Significance (-log10(p)) | Studies (n) | Candidate gene | Effect | |||
|---|---|---|---|---|---|---|---|---|---|
Left | Right | Min | Max | Min | Max | ||||
4-parent CSIRO MAGIC population | |||||||||
2BS | 159.29 | 165.35 | 1.6 | 11.8 | 1.94 | 10.9 | 7/12 | PPD-B135 | Late allele in C increases SPS |
2DS | 0 | 9.61 | 15.9 | 30.2 | 22.21 | 38.71 | 5/12 | PPD-D135 | Late allele in Y/B increases SPS |
2DL | 95.26 | 99.45 | 1.1 | 5.9 | 2 | 12.03 | 10/12 | Unknown | |
4AL | 61.76 | 62.68 | 2.6 | 3.6 | 2.19 | 7.17 | 4/12 | Unknown | |
5AL | 88.39 | 89.07 | 9.5 | 33.2 | 19.55 | 126.39 | 3/12* | VRN-A135 | Late allele in B increases SPS |
5BL | 97.75 | 99.74 | 1 | 4.5 | 1.54 | 9.03 | 7/12 | VRN-B135 | Late allele in C increases SPS |
5DL | 131.11 | 152.57 | 1.5 | 8.8 | 2.17 | 17.76 | 8/12 | VRN-D135 | Late allele in Y/C/W increases SPS |
7AL | 58.7 | 60.3 | 6.6 | 24.8 | 5.33 | 44.05 | 12/12 | WAPO-A1 | See Table 2 |
7BL | 71.72 | 74.59 | 1.4 | 3.9 | 2.31 | 6.73 | 4/12 | WAPO-B1 | See Table 2 |
7BS | 166.24 | 170.19 | 3.2 | 14.5 | 1.4 | 35.67 | 3/12 | VRN-B336 | Early allele in B decreases SPS$ |
8-parent NIAB MAGIC population | |||||||||
2DS | 48.57 | 57.64 | 5 | 12.5 | 4.18 | 12.87 | 2/2 | PPD-D135 | Early allele in S decreases SPS |
7AL | 257.05 | 257.21 | 19.2 | 33.8 | 42.1 | 66.17 | 2/2 | WAPO-A1 | See Table 2 |
7BL | 144.34 | 144.5 | 1.5 | 1.5 | 2.05 | 2.05 | 1/2 | WAPO-B1 | See Table 2 |
