In contrast, the ITS data revealed considerable genetic diversity and fine-scale genetic structuring in G. Gracilaria salicornia was less diverse and lacked apparent geographic structure. babae in the midpoint-rooted phylogeny inferred from ITS data despite the failure to retrieve the two taxa in reciprocal monophyly. Despite the low genetic variation, rbcL and cox1 showed a concordant phylogeographic split that largely corresponds to Peninsular Malaysia and East Malaysia, except for a sample from East Malaysia that was consistently grouped with samples from the peninsula. Owing to the unique biology of the red algal parasite, identical phylogeographies were inferred from the rbcL and cox1 sequences in both G. The present study compares genetic structure from the plastid rbcL, mitochondrial cox1, and nuclear internal transcribed spacer (ITS) sequences among 13 populations of Gracilaria salicornia and its red algal parasite, G.
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