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Morphological divergence within the largest genetically consistent group of wild Tilapia
Environmental Biology of Fishes ( IF 1.4 ) Pub Date : 2021-05-05 , DOI: 10.1007/s10641-021-01098-4
Patrick Senam Kofi Fatsi , Shaharior Hashem , Ebenezer Koranteng Appiah , Emmanuel Tetteh-Doku Mensah , Seyramsarah Blossom Setufe , Hidetoshi Saito , Koichiro Kawai

Morphometric and meristic data were used in this study to establish morphological variations within the largest genetically consistent groups of five wild populations of tilapia from Kyushu and Okinawa ecological regions of Japan. The genetic analysis based on mitochondrial DNA relatedness was used to determine the data range used for the morphological analyses. During the morphological analyses, the morphometric and meristic data were correlated by two multivariate statistical methods, such as PCA and LDA. Both statistical methods observed morphological differences of higher divergence in Okinawa contrary to Kyushu. Additionally, the statistical relationship between the estimated non-parametric test of ANOSIM (R = 0.21; p ˂ 0.05) and PERMANOVA (F = 4.20; p ˂ 0.05) indicated a higher magnitude of morphological separation, especially in Okinawa; nevertheless, water temperature, conductivity, and salinity levels vary widely in Kyushu than in Okinawa. All observed differences could be attributed to either genetic and/or environmental factors, which are major variables in influencing phenotypic variability. However, since tilapia in Japan experienced multiple introductions from different countries and environmental backgrounds, we recommend further studies under a controlled environment to ascertain the environmental responsiveness during morphological differentiation within a genetically consistent group of tilapia.



中文翻译:

野生罗非鱼最大遗传一致性组内的形态差异

在这项研究中,使用形态计量学和综合数据建立了来自日本九州和冲绳生态区的五个罗非鱼野生种群的最大遗传一致性组中的形态变异。使用基于线粒体DNA相关性的遗传分析来确定用于形态分析的数据范围。在形态分析过程中,形态学数据和综合数据通过两种多元统计方法(例如PCA和LDA)进行关联。两种统计方法都观察到与九州相反的冲绳较高发散的形态学差异。另外,ANOSIM(的估计的非参数检验之间的统计关系- [R  = 0.21; p ˂0.05)和PERMANOVA(˚F  = 4.20;p ˂0.05)表明形态分离的较高量值,尤其是在冲绳; 但是,九州的水温,电导率和盐度水平与冲绳相比差异很大。所有观察到的差异都可以归因于遗传和/或环境因素,它们是影响表型变异性的主要变量。但是,由于罗非鱼在日本经历了来自不同国家和环境背景的多次介绍,因此我们建议在受控环境下进行进一步研究,以确定在遗传上一致的罗非鱼组中形态分化期间的环境响应能力。

更新日期:2021-05-05
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