Citation
Singh Ombir, . and George M., . and Saikia D., . (2006) An early assessment of Dipterocarpus retusus progeny trial. In: 8th Round-Table Conference on Dipterocarps: Dipterocarps - Enhancing Capacities in Sustainable Development and Poverty Alleviation, 15-17 Nov 2005, Ho Chi Minh City (Vietnam).
Abstract
Dipterocarpus retusus is an important species of raw material for plywood production in northeast India. The irregular management practices and regeneration problems resulted in the degradation of natural forest population of this species. In order to conserve the natural forest of D. retusus and to ensure the sustainable supply of raw material to the local plywood industries there is a need to raise plantations of the improved quality seeds. To achieve the objective Rain Forest Research Institute (RFRI) has started an improvement program for this species in 1998 and accordingly a progeny trial of the species was established to screen out superior genotypes for further multiplication. An evaluation of this progeny trial of 17 half-sib families of D. retusus was conducted at the age of fifth year for plant height (H) diameter at breast height (DBH) clear bole height (CBH) and crown diameter (Cr. dia.). Significant variation in all progenies was observed for the traits studied. The performance of progenies viz. JKG –3 DMP-9 and JKG- 2 was found highly significant for all the traits over the check progeny. In inheritance study heritability for height diameter at breast height clear bole height and crown diameter was recorded as 0.92 0.56 0.90 and 0.83 respectively. These results indicates that the out standing progenies can be used in recombination breeding and mass multiplication in different afforestation and reforestation programs till final results obtained. The genetic information from early testing can also be used to enhance selection efficiency at mature stage by culling inferior families.
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Abstract
Dipterocarpus retusus is an important species of raw material for plywood production in northeast India. The irregular management practices and regeneration problems resulted in the degradation of natural forest population of this species. In order to conserve the natural forest of D. retusus and to ensure the sustainable supply of raw material to the local plywood industries there is a need to raise plantations of the improved quality seeds. To achieve the objective Rain Forest Research Institute (RFRI) has started an improvement program for this species in 1998 and accordingly a progeny trial of the species was established to screen out superior genotypes for further multiplication. An evaluation of this progeny trial of 17 half-sib families of D. retusus was conducted at the age of fifth year for plant height (H) diameter at breast height (DBH) clear bole height (CBH) and crown diameter (Cr. dia.). Significant variation in all progenies was observed for the traits studied. The performance of progenies viz. JKG –3 DMP-9 and JKG- 2 was found highly significant for all the traits over the check progeny. In inheritance study heritability for height diameter at breast height clear bole height and crown diameter was recorded as 0.92 0.56 0.90 and 0.83 respectively. These results indicates that the out standing progenies can be used in recombination breeding and mass multiplication in different afforestation and reforestation programs till final results obtained. The genetic information from early testing can also be used to enhance selection efficiency at mature stage by culling inferior families.
Additional Metadata
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Additional Information: | Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. QK 495 D564R859 2005 (095003273) Call Number |
| AGROVOC Term: | Dipterocarpus |
| AGROVOC Term: | Dipterocarpaceae |
| AGROVOC Term: | Progeny testing |
| AGROVOC Term: | Progeny |
| AGROVOC Term: | Height |
| AGROVOC Term: | Breast height diameter |
| AGROVOC Term: | Crown canopy |
| AGROVOC Term: | Genetic differences |
| AGROVOC Term: | Heritability |
| Geographical Term: | MALAYSIA |
| Depositing User: | Mr. AFANDI ABDUL MALEK |
| Last Modified: | 24 Apr 2025 00:52 |
| URI: | http://webagris.upm.edu.my/id/eprint/7712 |
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