Abstract
Summary A provenance/progeny trial of Eucalyptus globulus ssp. globulus was established at Ilalaa Gojo in the central highlands of Ethiopia in 1990 to identify superior provenances and establish a breeding population for genetic improvement programs. The trial tested a total of 299 open-pollinated families from 52 localities within 17 natural sub-races in Australia, and one local landrace from Ethiopia. Nine years after planting, more than 61% of trees had survived and the overall mean height and diameter at breast height (dbh) of surviving trees were 21.2 m and 16.4 cm respectively. Significant (P < 0.001) differences in survival, height and dbh per tree were found between sub-races; differences among localities within the sub-races were also significant. Eastern and Western Otways, Cape Patton and Strzelecki Ranges in Victoria were the fastest-growing sub-races, and also displayed above—average survival. Sub-races from the Tasmanian mainland performed poorly; the Wilsons Promontory sub-race was the slowest-growing and displayed poor survival. The Ethiopian landrace performed well although it was not adequately represented in the trial. Assuming a coefficient of relationship of 0.4 for open-pollinated families, individual-tree within-sub-race heritabilities for height and dbh were 0.20 ± 0.03 and 0.16 ± 0.02 respectively. We conclude that there is substantial potential for genetic improvement of E. globulus in Ethiopia.
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Claims 11
Claim · model-written summary
More than 61% of trees survived nine years after planting.
- Taxon
- Eucalyptus globulus ssp. globulus
Eucalyptus globulus subsp. globuluse1 - Outcome
- trees had survivede0
- Value
- more than 61%e0
- Qualifier
- Nine years after plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nine years after planting, more than 61% of trees had survived”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Surviving trees had a mean height of 21.2 m.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Outcome
- mean heighte0
- Value
- 21.2 me0
- Qualifier
- surviving treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the overall mean height and diameter at breast height (dbh) of surviving trees were 21.2 m and 16.4 cm respectively”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Surviving trees had a mean diameter at breast height of 16.4 cm.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Outcome
- diameter at breast heighte0
- Value
- 16.4 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the overall mean height and diameter at breast height (dbh) of surviving trees were 21.2 m and 16.4 cm respectively”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Survival, height and diameter differed significantly between sub-races and among localities within sub-races.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Outcome
- survival, height and dbh per treee0
- Comparator
- sub-racese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant (P < 0.001) differences in survival, height and dbh per tree were found between sub-races; differences among localities within the sub-races were also significant”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Eastern and Western Otways, Cape Patton and Strzelecki Ranges were fastest growing and had above-average survival.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Material
- Eastern and Western Otways, Cape Patton and Strzelecki Rangese0
- Outcome
- fastest-growing sub-races, and also displayed above—average survivale0
- Direction
- fastest-growinge0
- Setting
- Victoriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Eastern and Western Otways, Cape Patton and Strzelecki Ranges in Victoria were the fastest-growing sub-races, and also displayed above—average survival”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Tasmanian mainland sub-races performed poorly.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Material
- Sub-races from the Tasmanian mainlande0
- Outcome
- performed poorlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sub-races from the Tasmanian mainland performed poorly”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Wilsons Promontory was slowest growing and had poor survival.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Material
- Wilsons Promontory sub-racee0
- Outcome
- slowest-growing and displayed poor survivale0
- Direction
- slowest-growinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Wilsons Promontory sub-race was the slowest-growing and displayed poor survival”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
The Ethiopian landrace performed well, but had limited trial representation.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Material
- Ethiopian landracee0
- Outcome
- performed welle0
- Qualifier
- not adequately represented in the triale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Ethiopian landrace performed well although it was not adequately represented in the trial”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Within-sub-race individual-tree height heritability was 0.20 ± 0.03.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Outcome
- heritabilities for heighte0
- Value
- 0.20 ± 0.03e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“individual-tree within-sub-race heritabilities for height and dbh were 0.20 ± 0.03 and 0.16 ± 0.02 respectively”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
Within-sub-race individual-tree diameter heritability was 0.16 ± 0.02.
- Taxon
- Eucalyptus globulus ssp. globulusEucalyptus globulus subsp. globuluse1
- Outcome
- heritabilities for height and dbhe0
- Value
- 0.16 ± 0.02e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“individual-tree within-sub-race heritabilities for height and dbh were 0.20 ± 0.03 and 0.16 ± 0.02 respectively”
e1“Eucalyptus globulus ssp. globulus”
Claim · model-written summary
The authors conclude E. globulus has substantial genetic improvement potential in Ethiopia.
- Taxon
- E. globulus
Eucalyptus globuluse0 - Outcome
- genetic improvemente0
- Setting
- Ethiopiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is substantial potential for genetic improvement of E. globulus in Ethiopia”