Genomic evidence resolves species identity and hybridization in farmed Golden pompano (Trachinotus anak)
文献类型：期刊论文
| 作者 | Guo, Liang1; Wang, Siqing1; Wei, Jiehong3; Peng, Rui1; Shen, Zhongyuan1; Zhou, Luojing1; Kang, Jiaxuan1; Rao, Ke1; Yang, Yang2; Chen, Zhennian2 |
| 刊名 | AQUACULTURE
 |
| 出版日期 | 2026-02-01 |
| 卷号 | 613页码:12 |
| 关键词 | Golden pompano aquaculture Trachinotus anak Hybridization risk Sexing marker |
| ISSN号 | 0044-8486 |
| DOI | 10.1016/j.aquaculture.2025.743298 |
| 通讯作者 | Guo, Liang(hnsfgl@hunnu.edu.cn) ; Wu, Chang() |
| 英文摘要 | Golden pompano (Trachinotus spp.) is China's most productive mariculture species, with annual yields exceeding 292 kt. However, the inconsistent application of scientific names, such as Trachinotus ovatus or T. blochii, has resulted in considerable taxonomic confusion. Moreover, artificial hybridization practices in hatcheries pose significant risks to the genetic integrity of this economically vital aquaculture resource. To address taxonomic ambiguities and quantify hybridization impacts, we conducted a comprehensive genomic analysis of farmed individuals from major production regions using genome-wide SNPs, mitochondrial COI barcoding, and comparative genomics. Results confirmed T. anak is the correct scientific name for the dominant cultivated species. Among 52 farmed individuals sampled across key production areas, 7.7 % were identified as hybrids, exhibiting 17-41 % T. blochii ancestry. Demographic modeling revealed a sharp decline in T. anak effective population size over the past twenty generations, coinciding with the expansion of hatchery operations. Phylogenomic analyses, including divergence time estimation, positive selection scans, and chromosomal inversion mapping, identified at least five genomic blocks (1.8-2.5 Mb) that may contribute to speciation, particularly those containing immune-related genes. Additionally, we have identified a novel 23-bp insertion-deletion mutation in Hsd17b1 that acts as a sex-determining variant, and its location overlaps with a previously reported sex-determining point mutation. By combining the genotyping of these two variants, it achieves 100 % accuracy in sex diagnosis, which can greatly support more reliable and efficient broodstock management. These findings not only clarify T. anak's taxonomic status but also underscore the urgent need for mandatory genetic monitoring of hatchery stocks to safeguard the long-term sustainability of this economically critical species. |
| WOS关键词 | OVATUS LINNAEUS ; CARANGIDAE ; ALIGNMENT ; ASSOCIATION ; PERFORMANCE ; GENERATION ; PATTERNS ; ATLANTIC ; HISTORY ; FORMAT |
| 资助项目 | National Key Research and Development Program of China[2024YFD2401802] ; National Key Research and Development Program of China[2022YFD2400504] ; Changsha Municipal Natural Science Foundation[kq2208168] ; Changsha Municipal Natural Science Foundation[kq2502128] |
| WOS研究方向 | Fisheries ; Marine & Freshwater Biology |
| 语种 | 英语 |
| WOS记录号 | WOS:001603600600002 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/203692]  |
| 专题 | 中国科学院海洋研究所 |
| 通讯作者 | Guo, Liang; Wu, Chang |
| 作者单位 | 1.Hunan Normal Univ, Coll Life Sci, Engn Res Ctr Polyploid Fish Reprod & Breeding, State Educ Minist, Changsha 410081, Hunan, Peoples R China 2.Hainan Chenhai Inst Fishery Sci, Minist Agr & Rural Affairs, Hainan Engn Res Ctr Germplasm Innovat & Utilizat, Lab Trop Marine Fish Germplasm Innovat & Utilizat, Sanya 572025, Hainan, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Liang,Wang, Siqing,Wei, Jiehong,et al. Genomic evidence resolves species identity and hybridization in farmed Golden pompano (Trachinotus anak)[J]. AQUACULTURE,2026,613:12. |
| APA | Guo, Liang.,Wang, Siqing.,Wei, Jiehong.,Peng, Rui.,Shen, Zhongyuan.,...&Wu, Chang.(2026).Genomic evidence resolves species identity and hybridization in farmed Golden pompano (Trachinotus anak).AQUACULTURE,613,12. |
| MLA | Guo, Liang,et al."Genomic evidence resolves species identity and hybridization in farmed Golden pompano (Trachinotus anak)".AQUACULTURE 613(2026):12. |
入库方式： OAI收割
来源：海洋研究所
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