Table V.
Disease severity in ethylene-insensitive mutants in response to races of P. sojae that are virulent or avirulent on the respective soybean genotypes
| Soybean Line | Race 1
|
Race
4
|
Race 7
|
Race 20
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 1 | 2 | 3 | 4 | 5 | 2 | 4 | 1 | 2 | 3 | 4 | |
| Hobbit 87 | 2.3 | 1.5 | – | 4.2 | 1.9 | 2.8 | 3.8 | – | 0.9 | 0.6 | 4.9 | 5.4 | 5.2 | 4.7 |
| T119N54 | 0.9a,b | 0.8 | – | 4.2 | 4.7a,c | 5.1a,c | 5.0a,c | – | 2.2d,c | 1.4e,c | 4.6 | 4.9 | 5.2 | 4.9 |
| T123N37 | – | 1.3 | – | – | – | – | 4.3 | – | – | 0.7 | – | – | – | 4.8 |
| T124N38 | – | 0.4d,b | – | – | – | – | 4.7d,c | – | – | 0.5 | – | – | – | 4.9 |
| A90-312022 | 5.5 | 5.0 | 4.2 | 4.4 | 4.2 | 5.1 | 5.6 | 3.8 | 4.9 | 4.0 | 4.6 | 3.9 | 4.9 | 5.3 |
| etr2-1 | 5.0 | 5.0 | – | 4.6 | 3.8 | 5.0 | 5.1 | – | 4.0e,b | 4.6 | 4.0d,b | 2.4a,b | 4.3e,b | 4.4d,b |
| T58N5 | – | 4.5 | 3.4e,b | 4.1 | 4.7 | – | 5.0 | 3.9 | 4.5 | 4.1 | 4.7 | 3.6 | – | 4.9 |
Disease symptom ratings for above ground plant tissues, presented as mean disease severity on a scale ranging from 0 (healthy plantlet) to 6 (seedling completely rotted); –, not tested. Data are presented from five separate tests; test number is indicated at the top of the column. Hobbit 87 and the three Hobbit 87 mutants carry Rsp1-k for resistance to races 1, 4, and 7 (data in bold); all other host-pathogen combinations involve compatible rather than gene-for-gene interactions. Statistical comparisons are between the mutant and its respective parent, Hobbit 87 or A90-312022.
Significant at P < 0.01.
Disease symptoms less severe than parent.
Disease symptoms more severe than parent.
Significant at P < 0.05.
Significant at P < 0.1.