Citation
Lim T. K., . and Luders L., . and Poffley M., . (1996) Studies on fruit deformity and nubbins in Irwin mango. [Proceedings Paper]
Abstract
Fruit defonnities and nubbins in the mango cultivar Irwin were first observed in Darwin and the Katherine regions in the fruiting season of 1990. Deformed Irwin fruits are characterised by malformed lumpy misshapen ;;Druse nose fruits often with patches of discoloured surfaces. Deformed fruits can be seedless or seeded. Nubbins are normal looking seedless fruits. Nubbins can be recognised while still young by a shallow groove extending from the beak of the peduncle end and usually abort before maturity. Our survey of properties with Irwin showed that both fruit disorders were widespread. Incidences were higher in properties which sprayed their crops during flowering. Studies on pollination and floral analysis revealed that deformed fruits were produced from malformed abnormal flowers mainly by the fusion of ovaries polycarpellary and rather rarely from fusion of ovary to starnenlstarninode carpelloidy. Early evidence suggest that abnormal flowers were caused by the effect of low temperature during panicle differentiation and emergence. Parthenocarpic fruits or nubbins were found to occur from self-pollination indicating that Irwin exhibits self incompatibility. Empirical evidence also suggest that nubbins could have resulted from the deleterious effects of low temperature resulting in incomplete fertilisation.
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Abstract
Fruit defonnities and nubbins in the mango cultivar Irwin were first observed in Darwin and the Katherine regions in the fruiting season of 1990. Deformed Irwin fruits are characterised by malformed lumpy misshapen ;;Druse nose fruits often with patches of discoloured surfaces. Deformed fruits can be seedless or seeded. Nubbins are normal looking seedless fruits. Nubbins can be recognised while still young by a shallow groove extending from the beak of the peduncle end and usually abort before maturity. Our survey of properties with Irwin showed that both fruit disorders were widespread. Incidences were higher in properties which sprayed their crops during flowering. Studies on pollination and floral analysis revealed that deformed fruits were produced from malformed abnormal flowers mainly by the fusion of ovaries polycarpellary and rather rarely from fusion of ovary to starnenlstarninode carpelloidy. Early evidence suggest that abnormal flowers were caused by the effect of low temperature during panicle differentiation and emergence. Parthenocarpic fruits or nubbins were found to occur from self-pollination indicating that Irwin exhibits self incompatibility. Empirical evidence also suggest that nubbins could have resulted from the deleterious effects of low temperature resulting in incomplete fertilisation.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. mal SB 359 I61 1996 Vol. 1 Call Number |
| AGROVOC Term: | Mangoes |
| AGROVOC Term: | Cultivars |
| AGROVOC Term: | Fruiting |
| AGROVOC Term: | Seedlessness |
| AGROVOC Term: | Seeds |
| AGROVOC Term: | Crops |
| AGROVOC Term: | Flowering |
| AGROVOC Term: | Maturity |
| AGROVOC Term: | Plant ovaries |
| AGROVOC Term: | Parthenocarpy |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:14 |
| URI: | http://webagris.upm.edu.my/id/eprint/11930 |
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