Abstract
Abstract Corymbia calophylla (marri), an endemic keystone tree species in southwest Western Australia, is increasingly impacted by the introduced basidiomycete smut Quambalaria pitereka . The basidiomycete rust Austropuccinia psidii (myrtle rust), an invasive pathogen recently introduced to Eastern Australia, is expected to spread to the southwest of Western Australia eventually. Austropuccinia psidii has similar epidemiology to Q . pitereka, and there is concern that C . calophylla may be susceptible. Preliminary pathogenicity tests showed significant differences in aggressiveness between twelve Q . pitereka isolates, and there was evidence of interactions between isolates and C . calophylla provenances. Seedlings from 59 open‐pollinated families from 11 provenances covering the natural range of marri were screened for resistance to Q . pitereka and A . psidii under controlled glasshouse conditions. Resistance of seedlings within provenances to Q . pitereka and A . psidii differed significantly. There was no significant correlation between resistance to Q . pitereka and resistance to A . psidii . Seedlings of provenances from wetter regions were more resistant to both pathogens, but the correlation coefficients were insignificant. Seedlings of four families in three provenances (Serpentine, Chidlow, and Kingston) showed 100% resistance to Q . pitereka . Narrow‐sense heritability estimates were 0.07 for quambalaria shoot blight resistance and 0.34 for myrtle rust resistance. The results indicate the potential to use selected families/individuals resistant to Q . pitereka and A . psidii for tree improvement programs and adaptive management strategies.
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Claims 10
Claim · model-written summary
Q. pitereka isolates differed significantly in aggressiveness.
Not reportedTaxon
Verbatim
e0“significant differences in aggressiveness between twelve Q . pitereka isolates”
Claim · model-written summary
Pathogen isolates interacted with Corymbia provenance.
- Taxon
- C . calophylla
Corymbia calophyllae0 - Material
- provenancese0
- Outcome
- interactions between isolates and C . calophylla provenancese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“evidence of interactions between isolates and C . calophylla provenances”
Claim · model-written summary
Seedling resistance to Q. pitereka differed among provenances.
- Interactor
- Q . piterekaQuambalaria piterekae0pathogen
- Outcome
- Resistance of seedlings within provenances to Q . piterekae0
- Direction
- differede0
Not reportedTaxon
Verbatim
e0“Resistance of seedlings within provenances to Q . pitereka and A . psidii differed significantly”
Claim · model-written summary
Seedling resistance to A. psidii differed among provenances.
- Interactor
- A . psidii
.jpg?width=60)
Austropuccinia psidiie0pathogen - Outcome
- Resistance of seedlings within provenances to Q . pitereka and A . psidiie0
- Direction
- differede0
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Resistance of seedlings within provenances to Q . pitereka and A . psidii differed significantly”
Claim · model-written summary
Resistance to the two pathogens was not significantly correlated.
- Interactor
- Q . piterekaQuambalaria piterekae0pathogen
- Outcome
- resistance to Q . piterekae0
- Direction
- no significant correlatione0
- Qualifier
- resistance to A . psidiie0
Not reportedTaxon
Verbatim
e0“no significant correlation between resistance to Q . pitereka and resistance to A . psidii”
Claim · model-written summary
Seedlings from wetter provenances tended toward greater resistance to both pathogens, without significant correlations.
Not reportedTaxon
Verbatim
e0“Seedlings of provenances from wetter regions were more resistant to both pathogens, but the correlation coefficients were insignificant”
Claim · model-written summary
Four families from three provenances showed complete Q. pitereka resistance.
- Material
- four familiese0
- Interactor
- Q . piterekaQuambalaria piterekae0pathogen
- Outcome
- resistance to Q . piterekae0
- Value
- 100%e0
- Setting
- Serpentine, Chidlow, and Kingstone0
Not reportedTaxon
Verbatim
e0“Seedlings of four families in three provenances (Serpentine, Chidlow, and Kingston) showed 100% resistance to Q . pitereka”
Claim · model-written summary
Narrow-sense heritability of quambalaria shoot blight resistance was 0.07.
Not reportedTaxon
Verbatim
e0“Narrow‐sense heritability estimates were 0.07 for quambalaria shoot blight resistance and 0.34 for myrtle rust resistance”
Claim · model-written summary
Narrow-sense heritability of myrtle rust resistance was 0.34.
Not reportedTaxon
Verbatim
e0“Narrow‐sense heritability estimates were 0.07 for quambalaria shoot blight resistance and 0.34 for myrtle rust resistance”
Claim · model-written summary
The authors propose resistant families or individuals for tree improvement and adaptive management.
- Outcome
- use selected families/individuals resistant to Q . pitereka and A . psidii for tree improvement programs and adaptive management strategiese0
Not reportedTaxon
Verbatim
e0“potential to use selected families/individuals resistant to Q . pitereka and A . psidii for tree improvement programs and adaptive management strategies”