Table 3.
Significant associations between SSCP markers and tuber quality traits in the CHIPS-ALL population
| Locus | Chromosome no. | SSCP fragment | Fragment frequency (%) | CQA p (R 2)a | CQS p (R 2) | TSC p (R 2) | TSY p (R 2) |
|---|---|---|---|---|---|---|---|
| AGPaseS | I | AGPsS-9a | 19 | 0.003 ↑c (3.8) | 0.000 ↑ (6.9) | 0.000 ↑ (8.7) | 0.002 ↑ (4.1) |
| AGPsS-10a | 41 | 0.017 ↓ (2.4) | 0.009 ↓ (2.9) | 0.000 ↓ (11.4) | 0.000 ↓ (7,1) | ||
| AGPsS-10b | 54 | 0.008 ↑ (3.0) | 0.044 ↑ (1.8) | 0.021 ↑ (2.3) | nsb | ||
| Pain-1 | III | Pain1 prom-a | 28 | 0.001 ↑ (4.5) | 0.000 ↑ (11.1) | 0.000 ↑ (9.5) | 0.000 ↑ (5.3) |
| Pain1 prom-d/e d | 5 | 0.000 ↑ (6.0) | 0.000 ↑ (10.5) | 0.046 ↑ (1.8) | ns | ||
| Pain1 prom-g | 34 | 0.030 ↑ (2.1) | 0.008 ↑ (3.2) | 0.021 ↑ (2.4) | ns |
aThe amount of variance (in %) explained by the marker is given by the R2 statistic
bNot significant, p > 0.05
cDirection of effect: ↑ the marker allele has a positive effect on the trait (on average higher tuber starch content and starch yield, lighter chip color), ↓ the marker allele has a negative effect on the trait (on average lower tuber starch content and starch yield, darker chip color)
dTwo SSCP fragments d and e co-segregated in the CHIPS-ALL population