文献类型： 外文期刊

作者： Du, Jinxing ¹ ; Zhu, Tao ¹ ; Tian, Taihang ¹ ; Song, Hongmei ¹ ; Lei, Caixia ¹ ; Tian, Jing ¹ ; Han, Linqiang ² ; Li, Shengjie ¹ ;

作者机构： 1.Chinese Acad Fisheries Sci, China Minist Agr, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resource Applicat &, Guangzhou 510380, Peoples R China

2.Guangdong Liangshi Aquat Seed Ind Co Ltd, Foshan 528100, Peoples R China

关键词： Largemouth bass; Microsatellite marker; Genetic diversity; DNA fingerprinting; Identification

期刊名称：BMC GENOMICS （ 影响因子：3.7； 五年影响因子：4.2 ）

ISSN： 1471-2164

年卷期： 2025 年 26 卷 1 期

页码：

收录情况： SCI

摘要： BackgroundLargemouth bass (Micropterus salmoides, LMB) is an economic fish in China, which has developed into many different cultured populations in the past decades. These populations exhibit different growth rates, morphological traits, stress resistance, and genetic diversity. Analyzing genetic diversity and molecular identification of these populations is crucial for conserving and utilizing germplasm resources, as well as for breeding new varieties.ResultIn this study, ten distinct LMB populations from China were collected and examined using fluorescence-labeled microsatellite markers. A total of 53 alleles were identified using seven microsatellite primer pairs, with allele counts ranging from 5 to 11 and an average of 7.571. The observed heterozygosity among the ten LMB populations varied from 0.210 to 0.967, while expected heterozygosity ranged from 0.204 to 0.651, and the polymorphism information content was between 0.175 and 0.597. Genetic distance varied from 0.019 to 0.457, the genetic differentiation index ranged from 0.013 to 0.258, and the number of effective migrants (Nm) was between 0.719 and 18.981. The genetic structure analysis indicated that the ten LMB populations could be classified into two or four groups. The analysis of molecular variance (AMOVA) revealed that 83.77% of genetic variation was found within individuals, with only 16.23% attributed to differences among populations. Through construction of DNA fingerprinting, we discovered unique fragments at several loci were detected in the populations such as the reintroduced Northern LMB population, "Youlu No.3" population, and the hybrid populations. Additionally, we also created digital DNA fingerprint maps of these LMB populations. Through analysis the digital DNA fingerprints from four candidate LMB populations, three known populations corresponded with the populations collected in this study. These results indicated high identification efficiencies of the digital DNA fingerprinting created in this study.ConclusionWe established a method to distinguish 10 different LMB populations in China, which will assist in identification, traceability management, protection, and intellectual property rights of LMB in the future.