Table 1.
Comparison of vegetative compatibility (VC) tests on isolates of Hymenoscyphus fraxineus collected at three established (−E) or mixed (−M) woodland sites and three planted (−P) sites
| Subpopulation | Agar | No. of isolates | Scored pairs | Compatible pairs | VC types (min.–max.) | χ2 | |
|---|---|---|---|---|---|---|---|
| No. | % | ||||||
| BWY‐P | MA/ALMA | 8 | 28 | 2 | 7 | 6 | 0.02 |
| ASA | 8 | 28 | 1 | 4 | 7 | 0.36 | |
| ISC‐P | MA/ALMA | 13 | 74 | 4 | 5 | 9–10 | 0.12 |
| ASA | 13 | 71 | 5 | 7 | 9–10 | 0.04 | |
| PTW‐P | ALMA | 10 | 45 | 8 | 18 | 7–9 | 9.07 |
| ASA | 10 | 44 | 8 | 18 | 7–9 | 9.38 | |
| EPW‐E | MA/ALMA | 13 | 77 | 4 | 5 | 10–11 | 0.18 |
| ASA | 13 | 77 | 5 | 6 | 9–11 | 0.00 | |
| LWD‐E | MA/ALMA | 10 | 43 | 1 | 2 | 9 | 1.12 |
| ASA | 10 | 45 | 1 | 2 | 9 | 1.24 | |
| PND‐M | MA/ALMA | 10 | 45 | 1 | 2 | 10 | 1.23 |
| ASA | 10 | 45 | 0 | 0 | 10 | 2.90 | |
| Total | MA/ALMA | 11.70a | |||||
| ASA | 13.90a | ||||||
Isolate pairings were grown on malt agar (MA) and/or ash leaf malt agar (ALMA) and ash sapwood agar (ASA) and scored for presence or absence of a gap reaction; absence of the gap reaction indicated a compatible pairing. Chi‐squared calculated for compatible pairings on each type of agar with 5 d.f.
a
Indicates significant at the 5% confidence level.