Citation
Tsumura Y., . and Norwati M., . and Lee C. T., . and Niiyama K., . and Lee S. L., . and Obayashi K., . and Yoshihida Suyuma Y., . (2003) Outcrossing rates of Shorea curtisii: comparison between undisturbed and selectively logged compartments in Semangkok Forest Reserve. [Proceedings Paper]
Abstract
The outcrossing rates of Shorea curtisii Dipterocarpaceae from an undisturbed 6-ha plot and an adjacent 4-ha selectively logged plot in Semangkok Forest Reserve were examined. Multilocus outcrossing rates were estimated from isozyme variation in progeny arrays using mixed-mating model. Approximately 50 seeds each from 10 mother trees were collected from the undisturbed plot. Another 5 mother trees were investigated in the selectively logged plot. Six polymorphic loci were obtained from 5 enzyme systems. The overall outcrossing rate of S. Curtisii in the logged-over plot is significantly lower tm0.697 than that of the species in the undisturbed plot tm 0.813. Drastic inbreeding was observed in one of the trees from logged “ over forest. Besides decrease in density of flowering trees lower outcrossing rates could also be due to the negative effect of logging on the pollinators; behaviour. Impact of selective logging on the mating system of S. curtisii and its implication in genetic diversity conservation and choice of seed source for plantation forest are discussed.
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Abstract
The outcrossing rates of Shorea curtisii Dipterocarpaceae from an undisturbed 6-ha plot and an adjacent 4-ha selectively logged plot in Semangkok Forest Reserve were examined. Multilocus outcrossing rates were estimated from isozyme variation in progeny arrays using mixed-mating model. Approximately 50 seeds each from 10 mother trees were collected from the undisturbed plot. Another 5 mother trees were investigated in the selectively logged plot. Six polymorphic loci were obtained from 5 enzyme systems. The overall outcrossing rate of S. Curtisii in the logged-over plot is significantly lower tm0.697 than that of the species in the undisturbed plot tm 0.813. Drastic inbreeding was observed in one of the trees from logged “ over forest. Besides decrease in density of flowering trees lower outcrossing rates could also be due to the negative effect of logging on the pollinators; behaviour. Impact of selective logging on the mating system of S. curtisii and its implication in genetic diversity conservation and choice of seed source for plantation forest are discussed.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. QK495 D564R859 2002 Call Number. |
| AGROVOC Term: | Shorea |
| AGROVOC Term: | Dipterocarpaceae |
| AGROVOC Term: | Timber trees |
| AGROVOC Term: | Forest trees |
| AGROVOC Term: | Progeny testing |
| AGROVOC Term: | Isozymes |
| AGROVOC Term: | Mating systems |
| AGROVOC Term: | Logging |
| AGROVOC Term: | Plots |
| AGROVOC Term: | Forest reserves |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:16 |
| URI: | http://webagris.upm.edu.my/id/eprint/13401 |
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