Abstract
Initial selection of genetic materials may be hindered by the various stages required before a genotype can be operationally deployed on a commercial scale. In this context, Eucalyptus hybrids, although highly significant to Brazilian forestry, may present rooting difficulties and/or developmental abnormalities when propagated via mini-cutting, such as plagiotropic growth. This study aimed to evaluate different concentrations of IBA on the survival and rooting of mini-cuttings of Eucalyptus urophylla × Eucalyptus dunnii, to analyze their initial growth and development after planting in comparison to operational clones, and to validate the classification of the hybrid clone as operational. The effects of four IBA concentrations (0, 1,500, 3,000, and 4,500 mg L⁻¹) on the survival and rooting of mini-cuttings were assessed. After 120 days of rooting, the seedlings produced under 0 and 1,500 mg L⁻¹ treatments were transplanted into pots, where they remained for an additional 180 days. Morphological traits such as height, root collar diameter, and Dickson Quality Index (DQI) were evaluated, as well as the intensity of plagiotropic growth exhibited by the hybrid. The 1,500 mg L⁻¹ IBA concentration improved rooting performance but also induced higher rates of growth abnormalities. The hybrid exhibited a genetic predisposition to growth anomalies, which were exacerbated by IBA application Despite the significant rooting and biomass accumulation of the E. urophylla × E. dunnii hybrid, the studied clone is not yet suitable for commercial propagation due to its plagiotropic growth pattern.
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Claims 6
Claim · model-written summary
IBA at 1,500 mg L⁻¹ improved rooting performance of hybrid Eucalyptus mini-cuttings.
- Taxon
- Eucalyptus urophylla × Eucalyptus dunnii
Eucalyptus urophyllat0 - Treatment
- 1,500 mg L⁻¹ IBAe0
- Outcome
- rooting performancee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 1,500 mg L⁻¹ IBA concentration improved rooting performance but also induced higher rates of growth abnormalities”
t0“Eucalyptus urophylla × Eucalyptus dunnii”
Claim · model-written summary
IBA at 1,500 mg L⁻¹ increased growth abnormality rates in the hybrid.
- Taxon
- Eucalyptus urophylla × Eucalyptus dunniiEucalyptus urophyllat0
- Treatment
- 1,500 mg L⁻¹ IBAe0
- Outcome
- rates of growth abnormalitiese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 1,500 mg L⁻¹ IBA concentration improved rooting performance but also induced higher rates of growth abnormalities”
t0“Eucalyptus urophylla × Eucalyptus dunnii”
Claim · model-written summary
The hybrid showed genetic predisposition to growth anomalies.
- Taxon
- Eucalyptus urophylla × Eucalyptus dunniiEucalyptus urophyllat0
- Outcome
- genetic predisposition to growth anomaliese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hybrid exhibited a genetic predisposition to growth anomalies”
t0“Eucalyptus urophylla × Eucalyptus dunnii”
Claim · model-written summary
IBA application exacerbated the hybrid growth anomalies.
- Taxon
- Eucalyptus urophylla × Eucalyptus dunniiEucalyptus urophyllat0
- Treatment
- IBA applicatione0
- Outcome
- growth anomaliese0
- Direction
- exacerbatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth anomalies, which were exacerbated by IBA application”
t0“Eucalyptus urophylla × Eucalyptus dunnii”
Claim · model-written summary
The hybrid had significant rooting and biomass accumulation.
- Taxon
- E. urophylla × E. dunniiEucalyptus urophyllae0
- Outcome
- rooting and biomass accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite the significant rooting and biomass accumulation of the E. urophylla × E. dunnii hybrid”
Claim · model-written summary
The authors judged the clone unsuitable for commercial propagation because of plagiotropic growth.
- Taxon
- Eucalyptus urophylla × Eucalyptus dunniiEucalyptus urophyllat0
- Outcome
- not yet suitable for commercial propagatione0
- Qualifier
- due to its plagiotropic growth patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the studied clone is not yet suitable for commercial propagation due to its plagiotropic growth pattern”
t0“Eucalyptus urophylla × Eucalyptus dunnii”
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