Table 1. Summary of aphid scores in the field and greenhouse tests using 184 RILs and the two parents.
| Phenotype a |
Parents
b
|
RIL population
|
||
|---|---|---|---|---|
| PI 567324 | Wyandot | Mean | s.d. | |
| Field2W | 1.3a | 4.5b | 3.53 | 1.46 |
| Field4W | 1.3a | 4.7b | 3.00 | 1.61 |
| GH2W | 1.0a | 4.6b | 2.58 | 1.65 |
| GH4W | 1.3a | 4.7b | 3.08 | 1.68 |
Abbreviation: RIL, recombinant inbred line.
Aphid scores ranged from 1 to 5 for all of phenotypes: 1=<10 aphids, 3=25–50 aphids and 5=>100 aphids per plant for aphid score at 2 weeks, and 1=<25 aphids, 3=100–200 aphids and 5=>500 aphids per plant for aphid score at 4 weeks.
a
Field2W: aphid scores after 2 weeks in the field cage, Field4W: aphid scores after 4 weeks in the field cage, GH2W: aphid scores after 2 weeks in the greenhouse, and GH4W: aphid scores after 4 weeks in the greenhouse.
b
Means followed by different letters for each phenotype are significantly different at P<0.0001.