Table II. Phenotypic characteristics of transgenic potato plants expressing either a CKX gene from Arabidopsis or an IPT gene from Agrobacterium.
Parameters were determined from soil-grown plants at harvest. Results are shown for three independent experiments and represent means ± se of 25 to 40 plants. Statistically significant differences from the wild type were determined using one-tailed t tests assuming unequal variance and are indicated by asterisks (P ≤ 0.05).
| Plant | Stem Height | Tuber Yield | No. of Tubers per Plant |
| cm | g plant−1 | ||
| Wild type (Solara) | 56.7 ± 2.0 | 176.7 ± 10.4 | 7.6 ± 0.4 |
| CKX | |||
| CKX-4 | 39.2 ± 0.8* | 20.0 ± 0.7* | 6.5 ± 0.6 |
| CKX-10 | 46.5 ± 1.2* | 136.1 ± 5.1* | 3.9 ± 0.4* |
| CKX-11 | 55.3 ± 1.3 | 168.0 ± 2.7 | 5.8 ± 0.3* |
| IPT | |||
| IPT-6 | 54.2 ± 1.1 | 170.2 ± 3.9 | 7.2 ± 0.2 |
| IPT-9 | 11.1 ± 0.9* | 10.7 ± 3.4* | 2.8 ± 0.6* |