Estimation of genetic parameters of in vitro traits in acacia mangiumwilld
| Main Author: | Perpustakaan UGM, i-lib |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 1999
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/21729/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=4602 |
Daftar Isi:
- The study was carried out to examine the variability in the responses of differ-em A. mangium genotypes to a micropropagation protocol and to develop genetic model for estimations of in vitro traits. A total of 114 clones, derived from 19 trees, 3 pods per tree and 2 seeds per pod, were used in the study. Published protocols were used to micropropagate explants taken from aseptically germinated seeds. The experiment was laid out as a completely randomised design with nested treatment structure consisting of individuals within pods, within trees, within location. In vitro performance of the clones was generally poor. Axillary branching was not prolific, and multiplication rate was low ranging between 1,3 to 3,0 on. tree basis. Removal of terminal shoot did not have significant effect on the growth of axillary branching. Genotypic differences between propagu les derived from supposedly full-sibs and half-sibs individuals were variable. The lack of significant differences among pods may be due to the small number of seeds per pod used in the study. A genetic model for quantitative analysis was developed taking into account the possible relationships among seeds within pod and pods within tree. Variance component for additive and non-additive genetic effects were estimated under the assumption that the outcrossing rate was 0,9 and the rate of the half-sibbing within pods was 0,85. narrow sense heritability estimates for in vitro traits were generally high, an indication of strong additive genetic control. Keywords : acacia mangium, in vitro traits, genetic parameters