Determination of genetic stability in Kelampayan plantlets regenerated from tissue culture using RAPD markers
Kelampayan species from the family of Rubiaceae was studied in terms of its ability to conserve genetic stability throughout plantlets regeneration from tissue culture specifically by organogenesis, via the culturing of nodal segments and shoot tips. The assessment of genetic stability had been c...
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| Main Author: | |
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| Format: | Final Year Project Report |
| Language: | English |
| Published: |
Universiti Malaysia Sarawak, (UNIMAS)
2012
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| Online Access: | http://ir.unimas.my/id/eprint/6169/1/Flora%20Lapik%20ft.pdf http://ir.unimas.my/id/eprint/6169/ |
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| Summary: | Kelampayan species from the family of Rubiaceae was studied in terms of its ability to
conserve genetic stability throughout plantlets regeneration from tissue culture specifically
by organogenesis, via the culturing of nodal segments and shoot tips. The assessment of
genetic stability had been carried out through the employment of Inter-Simple Sequence
Repeats (ISSR) Marker. Two ISSR primers had been selected, namely (ACC)6G and
(AG)9C as these primers were capable of producing informative and reproducible outcome.
Based on the ISSR band data, a total of 37 loci were generated. The binary data matrix
based on the Jaccard’s similarity coefficient was calculated, resulting to a similarity indices
ranged from 0.14 to 0.95 while the Shannon’s information index had indicated a value of
0.3431. 100% polymorphic loci had also been revealed. Additionally, the neighbor-joining
tree constructed based on DSA shared allele had implied similar result as UPGMA
dendrogram, signifying a relatively distant relationship among kelampayan plantlets and its
maternal genotype. The high level of genetic variation detected at the early stage of
culturing had shown to be as a result of mislabeling of samples during subculturing
process. These had ultimately proven the effectiveness of ISSR markers as reliable tools
for genetic variation studies, and thus indicated that kelampayan plantlets regenerated from
tissue culture in this study is genetically unstable. |
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