{"title":"中国沙鲑(Salmo caspius Kessler)种群恢复活动的分子遗传学分析。","authors":"Arezo Najafikhah, Omid Jafari, Maryam Nasrolahpourmoghadam, Mehrshad Zeinalabedini","doi":"10.1111/jfb.70041","DOIUrl":null,"url":null,"abstract":"<p><p>Maintenance of genetic diversity in broodstocks is highly important for restocking and aquaculture activities. Salmo caspius, a native species in the southern basin of the Caspian Sea, is a commercially important species, yet wild populations of S. caspius are experiencing severe reduction in size. Restocking has been the main conservation approach for S. caspius; however, there are no data describing whether stocking activities are having a positive or negative impact on the wild populations. In this study, we employed 28 polymorphic simple sequence repeats (SSRs) to assess the genetic population structure of S. caspius (n = 67) in the restocking centre of southern Caspian basin. Results showed a high level of genetic diversity (mean H<sub>o</sub> = 0.88) with no signatures of inbreeding. Structural analyses recognized the wild individuals (CP); however, a severe admixture structure for the hatchery-originated populations was observed, which can be due to the interbreeding events during restocking activity. Inter-population crosses would have diminished the level of differentiation among different populations (overall F<sub>st</sub> = 0.01), resulting in a population collapse in the future. Therefore, pre-use of kinship information obtained through genetic data accompanied by rehabilitation of natural habitats is highly suggested to amend the genetic health of S. caspius in the southern Caspian Sea.</p>","PeriodicalId":15794,"journal":{"name":"Journal of fish biology","volume":" ","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Molecular genetic assessments of the ongoing restocking activities on Salmo caspius Kessler, 1877.\",\"authors\":\"Arezo Najafikhah, Omid Jafari, Maryam Nasrolahpourmoghadam, Mehrshad Zeinalabedini\",\"doi\":\"10.1111/jfb.70041\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Maintenance of genetic diversity in broodstocks is highly important for restocking and aquaculture activities. Salmo caspius, a native species in the southern basin of the Caspian Sea, is a commercially important species, yet wild populations of S. caspius are experiencing severe reduction in size. Restocking has been the main conservation approach for S. caspius; however, there are no data describing whether stocking activities are having a positive or negative impact on the wild populations. In this study, we employed 28 polymorphic simple sequence repeats (SSRs) to assess the genetic population structure of S. caspius (n = 67) in the restocking centre of southern Caspian basin. Results showed a high level of genetic diversity (mean H<sub>o</sub> = 0.88) with no signatures of inbreeding. Structural analyses recognized the wild individuals (CP); however, a severe admixture structure for the hatchery-originated populations was observed, which can be due to the interbreeding events during restocking activity. Inter-population crosses would have diminished the level of differentiation among different populations (overall F<sub>st</sub> = 0.01), resulting in a population collapse in the future. Therefore, pre-use of kinship information obtained through genetic data accompanied by rehabilitation of natural habitats is highly suggested to amend the genetic health of S. caspius in the southern Caspian Sea.</p>\",\"PeriodicalId\":15794,\"journal\":{\"name\":\"Journal of fish biology\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-04-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of fish biology\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1111/jfb.70041\",\"RegionNum\":3,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"FISHERIES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of fish biology","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1111/jfb.70041","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FISHERIES","Score":null,"Total":0}
Molecular genetic assessments of the ongoing restocking activities on Salmo caspius Kessler, 1877.
Maintenance of genetic diversity in broodstocks is highly important for restocking and aquaculture activities. Salmo caspius, a native species in the southern basin of the Caspian Sea, is a commercially important species, yet wild populations of S. caspius are experiencing severe reduction in size. Restocking has been the main conservation approach for S. caspius; however, there are no data describing whether stocking activities are having a positive or negative impact on the wild populations. In this study, we employed 28 polymorphic simple sequence repeats (SSRs) to assess the genetic population structure of S. caspius (n = 67) in the restocking centre of southern Caspian basin. Results showed a high level of genetic diversity (mean Ho = 0.88) with no signatures of inbreeding. Structural analyses recognized the wild individuals (CP); however, a severe admixture structure for the hatchery-originated populations was observed, which can be due to the interbreeding events during restocking activity. Inter-population crosses would have diminished the level of differentiation among different populations (overall Fst = 0.01), resulting in a population collapse in the future. Therefore, pre-use of kinship information obtained through genetic data accompanied by rehabilitation of natural habitats is highly suggested to amend the genetic health of S. caspius in the southern Caspian Sea.
期刊介绍:
The Journal of Fish Biology is a leading international journal for scientists engaged in all aspects of fishes and fisheries research, both fresh water and marine. The journal publishes high-quality papers relevant to the central theme of fish biology and aims to bring together under one cover an overall picture of the research in progress and to provide international communication among researchers in many disciplines with a common interest in the biology of fish.