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Diversity 2009, 1(2), 89-101; doi:10.3390/d1020089

Intraspecific Variation in Commiphora wightii Populations Based on Internal Transcribed Spacer (ITS1-5.8S-ITS2) Sequences of rDNA

Department of Biotechnology, Birla Institute of Technology, Mesra-835215, Ranchi, Jharkhand, India
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Received: 15 September 2009 / Accepted: 19 October 2009 / Published: 26 October 2009
(This article belongs to the Special Issue Assessment of Plant Genetic Diversity)
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Abstract

Commiphora wightii is an endangered, endemic species found in the Thar Desert of Rajasthan, India and adjoining areas of Pakistan. The populations of this plant are rapidly dwindling due to overexploitation for their medicinally important resin. Analysis of nucleotide sequences of the internal transcribed spacer of rDNAs revealed low genetic diversity (π = 0.03905; θw = 0.05418) and high population structure (ϕST = 0.206). Parsimony based assessment and Bayesian analyses were conducted on the dataset. Mantel’s test showed a statistically significant positive correlation between genetic and geographic distance (r2 = 0.3647; p = 0.023). Anthropogenic overexploitation of C. wightii for its natural resources has resulted in population fragmentation. Initiatives should be taken immediately to preserve the diversity of this important plant species.
Keywords: internal transcribed spacer; rDNA; genetic diversity; guggul; endangered; endemic internal transcribed spacer; rDNA; genetic diversity; guggul; endangered; endemic
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Haque, I.; Bandopadhyay, R.; Mukhopadhyay, K. Intraspecific Variation in Commiphora wightii Populations Based on Internal Transcribed Spacer (ITS1-5.8S-ITS2) Sequences of rDNA. Diversity 2009, 1, 89-101.

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