Small-scale genetic structure of Gracilaria salicornia and its red algal parasite, G. babae (Gracilariaceae, Rhodophyta), in Malaysia
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Poh-Kheng Ng
Poh-Kheng Ng is a PhD candidate at the University of Malaya with particular interest in the phylogenetic relationships between the red algal host-parasite associations.
Phaik-Eem Lim is an associate professor at the University of Malaya. She was awarded a PhD by the University of Malaya for her work on the molecular taxonomy of
Gracilaria species. Her main research interest is on the phylogenetics and biodiversity studies of algae.
und
Siew-Moi Phang
Siew-Moi Phang is a professor and also the director of the Institute of Ocean and Earth Sciences (IOES), University of Malaya. She was awarded a PhD in applied phycology by the University of Malaya. Her research interests include algal systematics, genomics and genetic engineering, tissue and protoplast culture of seaweeds, and the use of algae in bioremediation. She serves as an Associate Editor of the
Journal of Applied Phycology and theMalaysian Journal of Science .
Abstract
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.babae, in Malaysia. Owing to the unique biology of the red algal parasite, identical phylogeographies were inferred from the rbcL and cox1 sequences in both G. babae and its host, G. salicornia. 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. On the other hand, G. salicornia was separated from G. babae in the midpoint-rooted phylogeny inferred from ITS data despite the failure to retrieve the two taxa in reciprocal monophyly. Gracilariasalicornia was less diverse and lacked apparent geographic structure. In contrast, the ITS data revealed considerable genetic diversity and fine-scale genetic structuring in G. babae within Malaysian waters, probably as a result of adaptation to the local host population.
About the authors
Poh-Kheng Ng is a PhD candidate at the University of Malaya with particular interest in the phylogenetic relationships between the red algal host-parasite associations.
Phaik-Eem Lim is an associate professor at the University of Malaya. She was awarded a PhD by the University of Malaya for her work on the molecular taxonomy of Gracilaria species. Her main research interest is on the phylogenetics and biodiversity studies of algae.
Siew-Moi Phang is a professor and also the director of the Institute of Ocean and Earth Sciences (IOES), University of Malaya. She was awarded a PhD in applied phycology by the University of Malaya. Her research interests include algal systematics, genomics and genetic engineering, tissue and protoplast culture of seaweeds, and the use of algae in bioremediation. She serves as an Associate Editor of the Journal of Applied Phycology and the Malaysian Journal of Science.
Acknowledgments
We thank Mr. Yu Chew Hock and Dr. Tan Ji for the assistance in collecting Gracilariasalicornia samples in Sabah. We are also grateful to Drs. Kato Aki and Tan Koh Siang for organizing the sampling trips in Japan and Singapore. This study is funded in part by the University of Malaya (PV082/2011B and RU006K-2014) and the Fundamental Research Grant Scheme (FP033-2012A) from the Ministry of Higher Education (MOHE), Malaysia.
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©2015 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- In this issue
- Editorial
- Seventh Asian Pacific Phycological Forum
- Research articles
- Characterization of Herposiphonia pectinata (Decaisne) comb. nov. (Rhodomelaceae, Rhodophyta) from Western Australia, based on morphology and DNA barcoding
- Reappraisal of nine species of Martensia (Delesseriaceae, Rhodophyta) reported from Korea based on morphology and molecular analyses
- Genetic variability and biogeography of the widespread red alga Hypnea flexicaulis (Gigartinales, Rhodophyta) based on rbcL and cox1 sequences
- Small-scale genetic structure of Gracilaria salicornia and its red algal parasite, G. babae (Gracilariaceae, Rhodophyta), in Malaysia
- Genetic diversity and taxonomy of foliose Bangiales (Rhodophyta) from Taiwan based on rbcL and cox1 sequences
- Foliose Halymenia species (Halymeniaceae, Rhodophyta) from Southeast Asia, including a new species, Halymenia malaysiana sp. nov.
- Photosynthetic and nutrient uptake physiology of Padina species in high and low nutrient waters in Bolinao, Pangasinan, Philippines
- Development and function of plasmodesmata in zygotes of Fucus distichus
Artikel in diesem Heft
- Frontmatter
- In this issue
- Editorial
- Seventh Asian Pacific Phycological Forum
- Research articles
- Characterization of Herposiphonia pectinata (Decaisne) comb. nov. (Rhodomelaceae, Rhodophyta) from Western Australia, based on morphology and DNA barcoding
- Reappraisal of nine species of Martensia (Delesseriaceae, Rhodophyta) reported from Korea based on morphology and molecular analyses
- Genetic variability and biogeography of the widespread red alga Hypnea flexicaulis (Gigartinales, Rhodophyta) based on rbcL and cox1 sequences
- Small-scale genetic structure of Gracilaria salicornia and its red algal parasite, G. babae (Gracilariaceae, Rhodophyta), in Malaysia
- Genetic diversity and taxonomy of foliose Bangiales (Rhodophyta) from Taiwan based on rbcL and cox1 sequences
- Foliose Halymenia species (Halymeniaceae, Rhodophyta) from Southeast Asia, including a new species, Halymenia malaysiana sp. nov.
- Photosynthetic and nutrient uptake physiology of Padina species in high and low nutrient waters in Bolinao, Pangasinan, Philippines
- Development and function of plasmodesmata in zygotes of Fucus distichus
