International Journal For Multidisciplinary Research

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Genetic Diversity and Population Structure Analysis of Canarium strictum Roxb. Using ISSR Markers in the Western Ghats and Eastern Ghats of Tamil Nadu

Author(s) Mr. Manikandan S, Ms. Revathy R, Mrs Haritha S, Mrs Sudha S, Mrs Sathyavani B, Dr. Shanthi A
Country India
Abstract Canarium strictum is an economically important medicinal and resin-yielding forest tree species distributed in the Western and Eastern Ghats of India. The species is increasingly threatened due to habitat fragmentation, overexploitation, and poor natural regeneration. The present study was undertaken to assess the genetic diversity and population structure of Canarium strictum populations from Tamil Nadu using ISSR molecular markers. A total of 36 Candidate Plus Trees (CPTs) were sampled in Eastern and Western Ghats. Genomic DNA was extracted and amplified using ISSR primers, of which 10 primers produced clear and polymorphic banding patterns suitable for analysis. The ISSR markers revealed substantial genetic variability among the populations. Genetic pairwise distance values ranged from 0.45 to 0.91, indicating moderate to high genetic differentiation. UPGMA cluster analysis based on Jaccard’s similarity coefficient grouped the populations into distinct clusters corresponding to the Western and Eastern Ghats. Western Ghats populations exhibited higher genetic similarity and stronger connectivity, while Eastern Ghats populations formed genetically distinct clusters with comparatively lower similarity coefficients, suggesting restricted gene flow and long-term geographic isolation. The study demonstrated that geographic barriers significantly influence the genetic structure of C. strictum populations. The findings provide important baseline information for conservation, sustainable utilization, and future tree improvement programmes for this economically important non timber forest tree species.
Keywords Canarium strictum, ISSR markers, genetic diversity, Genetic pairwise distance, UPGMA analysis, conservation genetics.
Field Biology > Genetics / Molecular
Published In Volume 8, Issue 3, May-June 2026
Published On 2026-06-04
DOI https://doi.org/10.36948/ijfmr.2026.v08i03.80442
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CrossRef DOI prefix of IJFMR is 10.36948/ijfmr

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