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Chew PC, Christianus A, Zudaidy JM, Ina-Salwany MY, Chong CM, Tan SG. Microsatellite Characterization of Malaysian Mahseer ( Tor spp.) for Improvement of Broodstock Management and Utilization. Animals (Basel) 2021; 11:ani11092633. [PMID: 34573599 PMCID: PMC8471032 DOI: 10.3390/ani11092633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/25/2021] [Accepted: 07/29/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, a mixture of Tor tambra and T. tambroides with unknown genetic background were collected from 11 localities in Malaysia for broodstock development and sperm cryo-banking. This study aims to assess the microsatellite (simple sequence repeat, SSR) variation, genetic diversity, genetic differentiation, level of gene flow, population structure, genetic relatedness and their demographic aspects among these Tor populations, in addition to establishing their SSR profile by employing 22 SSR markers via fragment analysis. Total genomic DNA was extracted from 181 samples (91 cryopreserved milt samples and 90 scale samples of live broodfish). Results showed the Tor spp. collection retained their genetic variation but exhibited excessive homozygosity among individuals within population. Moderate genetic differentiation was shown among the populations, with highly significant (p < 0.001) fixation indices (FST, FIS and FIT). A low gene flow over all loci (Nm 1.548) indicates little genetic variation transfer between populations. The genetic structures of all the populations were successfully resolved into four main clusters by an unweighted pair group method with arithmetic mean (UPGMA) dendrogram generated based on Nei's genetic distances. The population structures based on principal coordinates analysis (PCoA) and the Bayesian model also suggested four distinct clusters following geographical regions and eight closely related populations. This study provided a useful baseline reference for better genetic management and utilization of the Tor spp. stocks in their breeding and conservation programmes.
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Affiliation(s)
- Poh Chiang Chew
- Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia; (P.C.C.); (M.Y.I.-S.); (C.M.C.)
- Freshwater Fisheries Research Division, Fisheries Research Institute Glami Lemi, Jelebu 71650, Malaysia;
| | - Annie Christianus
- Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia; (P.C.C.); (M.Y.I.-S.); (C.M.C.)
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia
- Correspondence: ; Tel.: +60-3-8947-4884
| | - Jaapar M. Zudaidy
- Freshwater Fisheries Research Division, Fisheries Research Institute Glami Lemi, Jelebu 71650, Malaysia;
| | - Md Yasin Ina-Salwany
- Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia; (P.C.C.); (M.Y.I.-S.); (C.M.C.)
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Chou Min Chong
- Institute of Bioscience, Universiti Putra Malaysia, Serdang 43400, Malaysia; (P.C.C.); (M.Y.I.-S.); (C.M.C.)
- Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Soon Guan Tan
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Serdang 43400, Malaysia;
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Development of 26 highly polymorphic microsatellite markers for the highly endangered fan mussel Pinna nobilis and cross-species amplification. Mol Biol Rep 2020; 47:2551-2559. [PMID: 32095986 DOI: 10.1007/s11033-020-05338-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 02/13/2020] [Accepted: 02/18/2020] [Indexed: 10/24/2022]
Abstract
The fan mussel, Pinna nobilis is a highly endangered bivalve species endemic to the Mediterranean Sea. During the last few decades, populations have been greatly reduced due to anthropic impacts and they are now under strict protection in most Mediterranean countries. Today, the species is facing a major crisis following the introduction of an haplosporidan parasite which is driving mass mortality in almost all P. nobilis populations throughout the Mediterranean Sea. Gathering additional knowledge regarding dynamics and connectivity patterns of P. nobilis populations is now more than ever critical. Here, we describe the development of 26 highly polymorphic microsatellite markers. Average allelic diversity of 10.9 alleles per locus was reported and heterozygosity ranged from 0.0294 to 0.9737. We tested cross-species amplification in four Pinna species for the new markers together with 10 already published markers, and analysed its success according to the genetic distances among species. Cross-species transferability success ranged from 3 to 38% and had a negative relationship with the genetic distance between the target species and the tested species. The establishment of this new set of high-resolution markers provides a useful tool to understand processes driving gene flow and genetic diversity in P. nobilis populations and the closest congeneric species.
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Rico C, Cuesta JA, Drake P, Macpherson E, Bernatchez L, Marie AD. Null alleles are ubiquitous at microsatellite loci in the Wedge Clam ( Donax trunculus). PeerJ 2017; 5:e3188. [PMID: 28439464 PMCID: PMC5398275 DOI: 10.7717/peerj.3188] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 03/15/2017] [Indexed: 12/17/2022] Open
Abstract
Recent studies have reported an unusually high frequency of nonamplifying alleles at microsatellite loci in bivalves. Null alleles have been associated with heterozygous deficits in many studies. While several studies have tested for its presence using different analytical tools, few have empirically tested for its consequences in estimating population structure and differentiation. We characterised 16 newly developed microsatellite loci and show that null alleles are ubiquitous in the wedge clam, Donax trunculus. We carried out several tests to demonstrate that the large heterozygous deficits observed in the newly characterised loci were most likely due to null alleles. We tested the robustness of microsatellite genotyping for population assignment by showing that well-recognised biogeographic regions of the south Atlantic and south Mediterranean coast of Spain harbour genetically different populations.
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Affiliation(s)
- Ciro Rico
- School of Marine Studies, Molecular Analytics Laboratory (MOANA), Faculty of Science Technology and Environment, The University of the South Pacific, Suva, Fiji.,Estación Biológica de Doñana, (EBD, CSIC), Sevilla, Spain
| | - Jose Antonio Cuesta
- Instituto de Ciencias Marinas de Andalucía (ICMAN, CSIC), Puerto Real (Cádiz), Spain
| | - Pilar Drake
- Instituto de Ciencias Marinas de Andalucía (ICMAN, CSIC), Puerto Real (Cádiz), Spain
| | | | - Louis Bernatchez
- Institut de Biologie Intégrative et des Systèmes (IBIS), Département de Biologie, Pavillon Charles-Eugène-Marchand, Laval University, Quebec, Canada
| | - Amandine D Marie
- School of Marine Studies, Molecular Analytics Laboratory (MOANA), Faculty of Science Technology and Environment, The University of the South Pacific, Suva, Fiji
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Implications for management and conservation of the population genetic structure of the wedge clam Donax trunculus across two biogeographic boundaries. Sci Rep 2016; 6:39152. [PMID: 27991535 PMCID: PMC5171699 DOI: 10.1038/srep39152] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 11/18/2016] [Indexed: 01/25/2023] Open
Abstract
In a resource management perspective, the understanding of the relative influence of the physical factors on species connectivity remains a major challenge and is also of great ecological and conservation biology interest. Despite the overfishing threat on the wedge clam Donax trunculus in Europe, relatively little information is known about its population genetic structure and connectivity and their consequences on conservation policies. We employed 16 microsatellite loci to characterise the genetic diversity and population structure of D. trunculus. A total of 514 samples from seven different localities along the Atlantic-Mediterranean transition, from the Atlantic (Gulf of Cádiz) to the north-western Mediterranean were genotyped. The analysis of the population genetic structure displayed a clear distinction along the Atlantic-Mediterranean transition with different clusters in the Atlantic Ocean, the Alboran Sea and the northwestern Mediterranean. Consequently, we recommend that these three areas should be considered as different management units. We showed that all populations seem to be at high long-term risk of extinction with the exception of the protected Doñana National Park population which still seems to have evolutionary potential. Therefore, our results emphasized the necessity of protection of this economic resource and the validity of molecular tools to evaluate the population dynamics.
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Thai BT, Tan MH, Lee YP, Gan HM, Tran TT, Austin CM. Characterisation of 12 microsatellite loci in the Vietnamese commercial clam Lutraria rhynchaena Jonas 1844 (Heterodonta: Bivalvia: Mactridae) through next-generation sequencing. Mol Biol Rep 2016; 43:391-6. [PMID: 26922181 DOI: 10.1007/s11033-016-3966-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 02/23/2016] [Indexed: 10/22/2022]
Abstract
The marine clam Lutraria rhynchaena is gaining popularity as an aquaculture species in Asia. Lutraria populations are present in the wild throughout Vietnam and several stocks have been established and translocated for breeding and aquaculture grow-out purposes. In this study, we demonstrate the feasibility of utilising Illumina next-generation sequencing technology to streamline the identification and genotyping of microsatellite loci from this clam species. Based on an initial partial genome scan, 48 microsatellite markers with similar melting temperatures were identified and characterised. The 12 most suitable polymorphic loci were then genotyped using 51 individuals from a population in Quang Ninh Province, North Vietnam. Genetic variation was low (mean number of alleles per locus = 2.6; mean expected heterozygosity = 0.41). Two loci showed significant deviation from Hardy-Weinberg equilibrium (HWE) and the presence of null alleles, but there was no evidence of linkage disequilibrium among loci. Three additional populations were screened (n = 7-36) to test the geographic utility of the 12 loci, which revealed 100 % successful genotyping in two populations from central Vietnam (Nha Trang). However, a second population from north Vietnam (Co To) could not be successfully genotyped and morphological evidence and mitochondrial variation suggests that this population represents a cryptic species of Lutraria. Comparisons of the Qang Ninh and Nha Trang populations, excluding the 2 loci out of HWE, revealed statistically significant allelic variation at 4 loci. We reported the first microsatellite loci set for the marine clam Lutraria rhynchaena and demonstrated its potential in differentiating clam populations. Additionally, a cryptic species population of Lutraria rhynchaena was identified during initial loci development, underscoring the overlooked diversity of marine clam species in Vietnam and the need to genetically characterise population representatives prior to microsatellite development. The rapid identification and validation of microsatellite loci using next-generation sequencing technology warrant its integration into future microsatellite loci development for key aquaculture species in Vietnam and more generally, aquaculture countries in the South East Asia region.
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Affiliation(s)
| | - Mun Hua Tan
- Genomics Facility, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia.,School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
| | - Yin Peng Lee
- Genomics Facility, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia.,School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
| | - Han Ming Gan
- Genomics Facility, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia.,School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
| | | | - Christopher M Austin
- Genomics Facility, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia.,School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
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