ABSTRACT. Dioscorea cayenensis and Dioscorea rotundata are among the most important yam species for the humid and sub-humid tropics. We isolated nine polymorphic microsatellite markers using a microsatelliteenriched genomic library technique. The nine primer pairs were validated in 22 D. cayenensis accessions, and were tested for transferability in 26 D. rotundata accessions. The number of bands ranged from 2 to 4, with a mean of 3.11. D. cayenensis gave primer polymorphism information content values ranging from 0.37 to 0.62, while for D. rotundata the values ranged from 0.15 to 0.66. The D parameter in D. cayenensis ranged from 0.14 to 0.40, while in D. rotundata it ranged from 0.05 to 0.34. These SSR markers will be useful to characterize genetic diversity in D. cayenensis and D. rotundata accessions.
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