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A polymorphic microsatellite marker from the tropical tree Dryobalanops lanceolata (Dipterocarpaceae)
1Department of Botany, Kyoto University, Japan.
Idengaku Zasshi
|October 1, 1994
Summary
Researchers developed new genetic markers for Dryobalanops lanceolata, a tropical tree. These markers enable effective study of gene flow and DNA collection from tree trunks for population genetics.
Area of Science:
- Genetics
- Botany
- Ecology
Background:
- Tropical tree species like Dryobalanops lanceolata are vital but challenging to study.
- Understanding gene flow is crucial for conservation and management of these species.
Purpose of the Study:
- To isolate and characterize di-nucleotide microsatellites in Dryobalanops lanceolata.
- To develop hypervariable genetic markers for studying pollen-mediated gene flow.
- To assess the feasibility of using trunk tissue for DNA analysis in population genetics.
Main Methods:
- Genomic library construction and screening using oligonucleotide probes (GT, CA, CT).
- Sequencing of microsatellite loci and synthesis of PCR primers.
- DNA extraction from trunk and canopy tissues for genotype comparison.
Main Results:
- Twenty positive clones containing di-nucleotide repeats were identified from 1600 recombinants.
- Abundance estimates for (GT)n/(CA)n and (GA)n/(CT)n repeats were 1 per 84 kb and 80 kb, respectively.
- A selected microsatellite locus showed individual-specific variability due to repeat number differences, and trunk DNA matched canopy DNA, validating trunk tissue use.
Conclusions:
- Di-nucleotide microsatellites are effective hypervariable genetic markers for Dryobalanops lanceolata.
- Trunk tissue is a viable and accessible DNA source for population genetic studies of this tropical tree species.
- These markers will facilitate research on pollen-mediated gene flow and population structure.