Citation
Tan H., . and Tan A. M., . Genetic studies of leaf disease resistance in Hevea. pp. 108-114. ISSN 0127-7065
Abstract
This paper highlights the major findings on the genetic studies of Hevea leaf disease (Colletotrichum Corynespora and Oidium ) resistance using 18 selected genotypes and progenies from a five-parent diallel cross population. Results of the investigations showed that Colletotrichum and Corynespora resistance had moderate heritability estimates while Oidium resistance had relatively lower values. General combining ability (GCA) effects were important in controlling all the three disease resistance traits. Specific combining ability (SCA) effects were demonstrated to be important in accounting for the variation of Corynespora and Oidium resistance. Reciprocal effects were not detected for these diseases; and the relative magnitude of GCA to SCA was 37 (range: 25.6- 40.0) for Colletotrichum; 4.6 (range: 1.4 -11.1) for Corynespora and 2.0 (range: 0.5 4.8) for Oidium resistance. These findings are discussed in relation to Hevea breeding.
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Abstract
This paper highlights the major findings on the genetic studies of Hevea leaf disease (Colletotrichum Corynespora and Oidium ) resistance using 18 selected genotypes and progenies from a five-parent diallel cross population. Results of the investigations showed that Colletotrichum and Corynespora resistance had moderate heritability estimates while Oidium resistance had relatively lower values. General combining ability (GCA) effects were important in controlling all the three disease resistance traits. Specific combining ability (SCA) effects were demonstrated to be important in accounting for the variation of Corynespora and Oidium resistance. Reciprocal effects were not detected for these diseases; and the relative magnitude of GCA to SCA was 37 (range: 25.6- 40.0) for Colletotrichum; 4.6 (range: 1.4 -11.1) for Corynespora and 2.0 (range: 0.5 4.8) for Oidium resistance. These findings are discussed in relation to Hevea breeding.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Hevea |
| AGROVOC Term: | Hevea brasiliensis |
| AGROVOC Term: | Colletotrichum gloeosporioides |
| AGROVOC Term: | Corynespora cassiicola |
| AGROVOC Term: | Oidium |
| AGROVOC Term: | Infection |
| AGROVOC Term: | Disease resistance |
| AGROVOC Term: | Plant diseases |
| AGROVOC Term: | Genetics |
| AGROVOC Term: | Genetic variance |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 28 Apr 2025 03:57 |
| URI: | http://webagris.upm.edu.my/id/eprint/23364 |
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