Journal article
Genome-wide comparisons reveal evidence for a species complex in the black-lip pearl oyster Pinctada margaritifera (Bivalvia: Pteriidae)
Scientific Reports, Vol.8, 191
2018
Abstract
Evolutionary relationships in the black-lip pearl oyster Pinctada margaritifera which is highly valued for pearl production remain poorly understood. This species possesses an 18,000 km Indo-Pacific natural distribution, and its current description includes six subspecies defined exclusively on morphological characters. To evaluate its taxonomic identity using molecular data, 14 populations in both the Indian and Pacific Oceans (n= 69), and the congeneric taxa P. maxima and P. mazatlanica (n= 29 and n= 10, respectively) were sampled. Phylogenomic reconstruction was carried out using both 8,308 genome-wide SNPs and 10,000 dominant loci (DArTseq PAVs). Reconstructions using neighbour-joining (Nei's 1972 distances), maximum likelihood and Bayesian approaches all indicate that the taxonomy of P. margaritifera is quite complex, with distinct evolutionary significant units (ESUs) identified within Tanzanian and Iranian populations. Contrastingly, phylogenies generated for Pacific Ocean oysters resolved a large monophyletic clade, suggesting little support for two current morphological subspecies classifications. Furthermore, P. mazatlanica formed a basal clade closest to French Polynesian P. margaritifera, suggesting it may be conspecific. Collectively, these findings provide evidence that P. margaritifera comprises a species complex, perhaps as a result of population fragmentation and increased divergence at range limits.
Details
- Title
- Genome-wide comparisons reveal evidence for a species complex in the black-lip pearl oyster Pinctada margaritifera (Bivalvia: Pteriidae)
- Authors
- Monal M Lal (Corresponding Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringPaul C Southgate (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringDean R Jerry (Author) - James Cook UniversityKyall R Zenger (Author) - James Cook University
- Publication details
- Scientific Reports, Vol.8, 191; 13
- Publisher
- Nature Publishing Group
- Date published
- 2018
- DOI
- 10.1038/s41598-017-18602-5
- ISSN
- 2045-2322
- Copyright note
- Copyright © 2018. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
- Organisation Unit
- School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99451276002621
- Output Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web Of Science research areas
- Evolutionary Biology