Citation
Tan H., . and Khoo S. K., . and Ong S. H., . Selection of advanced polycross progenies in Hevea improvement. pp. 215-225. ISSN 0127-7065
Abstract
This paper reviews the progress made in the ortet (mother-tree) selection programme in Hevea improvement carried out at the Rubber Research Institute of Malaysia. Since the 1970s a concerted search for promising ortets from a population of 1.3 million seedlings derived from advanced polycross seed gardens viz. PBIG and PBFP trials in the commercial plantations of Peninsular Malaysia has been made. Out of this sample a total of 2613 genotypes (seedlings) has been selected for further test. Of the 1289 genotypes tested in the three field nurseries with two control clones PR 255 and RRIM600 34.1 showed mean yields which were equal or higher than the former while 59.7 showed equal or higher yields than the latter. In the first series of the selection which was tested in large scale clone trials a number of ortet materials showed yield levels higher than the control RRIM 600. Some of them had equal or higher mean yields than clones of the RRIM 800 series and promotio plot clones in adjacent fields. These results imply that selection of advanced polycross progenies (ortet selection) can be a useful complement to the normal hand (controlled) pollination programme in Hevea improvement.
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Abstract
This paper reviews the progress made in the ortet (mother-tree) selection programme in Hevea improvement carried out at the Rubber Research Institute of Malaysia. Since the 1970s a concerted search for promising ortets from a population of 1.3 million seedlings derived from advanced polycross seed gardens viz. PBIG and PBFP trials in the commercial plantations of Peninsular Malaysia has been made. Out of this sample a total of 2613 genotypes (seedlings) has been selected for further test. Of the 1289 genotypes tested in the three field nurseries with two control clones PR 255 and RRIM600 34.1 showed mean yields which were equal or higher than the former while 59.7 showed equal or higher yields than the latter. In the first series of the selection which was tested in large scale clone trials a number of ortet materials showed yield levels higher than the control RRIM 600. Some of them had equal or higher mean yields than clones of the RRIM 800 series and promotio plot clones in adjacent fields. These results imply that selection of advanced polycross progenies (ortet selection) can be a useful complement to the normal hand (controlled) pollination programme in Hevea improvement.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Hevea |
| AGROVOC Term: | Rubber crops |
| AGROVOC Term: | Progeny |
| AGROVOC Term: | Selection |
| AGROVOC Term: | Seedlings |
| AGROVOC Term: | Plantations |
| AGROVOC Term: | Genotypes |
| AGROVOC Term: | Plant nurseries |
| AGROVOC Term: | Clones |
| AGROVOC Term: | Controlled pollination |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 03:57 |
| URI: | http://webagris.upm.edu.my/id/eprint/23371 |
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