Abstract
Commiphora wightii (Arn.) Bhandari is a commercially, medicinally and traditionally important tropical shrub widely used to treat various ailments and disorders. Demand of this plant is increasing in the pharmaceutical and perfumery industries due to the presence of guggulsterone E and Z, two important isomers conferring lipid- and cholesterol-lowering, and anti-cancerous properties. Ruthless and u nscientific harvesting of oleo-gum resin by local populations from the wild, with negligible conservation efforts has made this species endangered and led to its inclusion in the Red Data Book of IUCN. It is imperative to have broad information regarding the extent of genetic variability available in the species to accelerate the breeding and conservation programs. Therefore, the present study was undertaken to analyze the extent of genetic variability existing among the C. wightii germplasm collected from Rajasthan and Haryana, the diversity rich Indian states, using ISSR and RAPD markers. A total of 100 (50 each) RAPD and ISSR markers were screened of which 37 RAPD and 43 ISSR primers were able to amplify DNA fragments. RAPD markers were more efficient, detecting 74.16 % polymorphism, compared to ISSR which detected 62.52 % polymorphism. Also, the values of average number of polymorphic bands per assay, polymorphism information content (PIC), diversity index (DI) and marker index (MI) were more for RAPD (7.76, 0.19, 0.38 and 2.53, respectively) than for ISSR (7.02, 0.13, 0.32 and 1.88) markers. The UPGMA dendrogram constructed using individual as well as combined data of the two marker systems separated the collected accessions into two major clusters containing 47 and 4 accessions, respectively, while one accession from Bikaner was not included in any cluster. Genetic similarity values obtained from Jaccard’s coefficient using combined data of both the marker systems were between 0.50 and 0.97. These results indicated the existence of wide genetic variability within this species and can be used for further research in the area of germplasm conservation, population genetics and plant breeding.
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AK thankfully acknowledges the financial assistance provided by DBT, Government of India, New Delhi, under the project sanctioned vide order no- BT/PR 10526/NDB/51/164/2008.
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Communicated by A. Chandra.
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Kulhari, A., Singh, R., Chaudhury, A. et al. Assessment of genetic variability through ISSR and RAPD markers in Commiphora wightii (Arn.) Bhandari. Acta Physiol Plant 37, 113 (2015). https://doi.org/10.1007/s11738-015-1859-y
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DOI: https://doi.org/10.1007/s11738-015-1859-y