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John, Reshma
- Estimation of Genetic Diversity in Nutmeg (Myristica fragrans Houtt.) Selections Using RAPD Markers
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1 Regional Agricultural Research Station (KAU), Kottayam (Kerala), IN
1 Regional Agricultural Research Station (KAU), Kottayam (Kerala), IN
Source
International Journal of Plant Sciences, Vol 12, No 2 (2017), Pagination: 102-107Abstract
Nutmeg (Myristica fragrans Houtt.) is an evergreen tree and popular spice. In the present study, Random Amplified Polymorphic DNA (RAPD) analysis was performed to assess the genetic diversity among the 19 superior accessions of nutmeg collected from different geographic locations and maintained in the germplasm collections of Regional Agricultural Research Station, Kumarakom, Kerala. This included one released variety IISR Viswasree. Out of 28 RAPD primers tested, 20 were amplified. Out of the 109 loci amplified, 82 were polymorphic with an average polymorphism rate of 72.74 per cent. The number of bands for each primer ranged from 2 to 8. The markers which produced maximum number of polymorphic bands were BB-18 and PO-5. PIC value of the markers ranging from 0.09 (OPA 11) to 0.48 (W-15) with an average of 0.31. The marker index (MI) varied between 0.09 and 2.08 with an average of 1.25. Jaccard’s similarity co-efficient of the genotypes ranged between 0.34-0.93. Dendrogram constructed based on UPGMA analysis grouped the 19 selected genotypes into two major clusters. The knowledge on genetic diversity of nutmeg can be used for further breeding programmes for getting higher nut and mace yield.Keywords
Nutmeg, Genetic Diversity, RAPD, Dendrogram.
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