Population Genomic Analyses of Wild and Farmed Striped Catfish Pangasianodon Hypophthalmus in the Lower Mekong River
| Autor: | Vu Thi Trang, Tran Thi Thuy Ha, Vo Thi Bich Thuy, Nguyen Thanh Vu, Nguyen Hong Nguyen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
animal structures Population Zoology Ocean Engineering 010603 evolutionary biology 01 natural sciences 03 medical and health sciences lcsh:Oceanography Effective population size lcsh:VM1-989 Mekong river lcsh:GC1-1581 education striped catfish 030304 developmental biology Water Science and Technology Civil and Structural Engineering next generation sequencing 0303 health sciences education.field_of_study Genetic diversity biology business.industry fungi lcsh:Naval architecture. Shipbuilding. Marine engineering genetic diversity biology.organism_classification gene flow and effective population size Agriculture Freshwater fish business Inbreeding Catfish lower Mekong basin |
| Zdroj: | Journal of Marine Science and Engineering, Vol 8, Iss 471, p 471 (2020) Journal of Marine Science and Engineering Volume 8 Issue 6 |
| ISSN: | 2077-1312 |
| Popis: | The striped catfish Pangasianodon hypophthalmus is an important freshwater fish cultured in many countries where the collection of wild brooders is still widely practiced. Global farming development of this species makes use of significant natural resources that pose challenges for the genetic diversity of striped catfish. Hence, this study aims to conduct a systematic genetic diversity assessment of wild and farmed catfish stocks collected from four major pangasius-farming countries, using a new genotyping by sequencing platform known as DArT-seq technology. Our population genomic analyses using 7263 single-nucleotide polymorphisms (SNPs) after high-quality-control showed that there were two distinct populations of striped catfish in the lower Mekong river: (i) wild catfish from Thailand and (ii) catfish from Cambodia and Vietnam. The genetic diversity was greatest (0.363) in the wild stock from Thailand, but it was lower in farmed and wild stocks in other countries (0.049 to 0.088). The wild stocks were more genetically diverse than the farmed animals (0.103 vs 0.064). The inbreeding coefficient ranged from 0.004 and 0.109, with the lowest value (&minus 0.499) in the wild animals from Thailand. Molecular inference methods revealed high degree of historical effective population size (1043.9&ndash 1258.4), but there was considerable decline in the contemporary estimates in all populations (10.8 to 73.6). Our additional analyses calculating divergent times and migration patterns showed that the wild catfish from Thailand stand out as separate lineages, while those from Cambodia and Vietnam are genetically identical. Our results also indicated that the cultured stock in Bangladesh originated from the lower part of the Mekong river. These findings have significant practical implications in the context of genetic selection and conservation of striped catfish in the region. Collectively, they will contribute to the sustainable development of the striped catfish sector in these countries. |
| Databáze: | OpenAIRE |
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