Complete Mitochondrial Genome of Parabotia bimaculata (Cypriniformes: Cobitidae: Botiinae), an Endemic Riverine Loach in
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Complete Mitochondrial Genome of Parabotia bimaculata (Cypriniformes: Cobitidae: Botiinae), an Endemic Riverine Loach in China and Phylogenetic Analysis for Botiinae Yanjun Shen 1 & Jian Wang 2 & Fubin Zhang 3 Received: 27 July 2019 / Revised: 22 October 2019 / # Springer Nature Switzerland AG 2020
Abstract Parabotia bimaculata is a common small-bodied endemic riverine loach in China. There was still no relevant genetic information for P. bimaculata. Here, we reported that the complete mitochondrial genome of P. bimaculata was a circular molecule of 16,588 bp in length, with two rRNA genes, 13 protein-coding genes, 22 tRNA genes, and a control region (D-loop). The gene composition and the structural arrangement were identical to the other Parabotia species and most of other teleosts. The nucleotide acid composition of the entire mitogenome was 30.8% for A, 27.9% for C, 16.1% for G, and 25.3% for T, with an A + T content of 56.1%. Phylogenetic analyses placed P. bimaculata in a well-supported monophyletic cluster with the other three Parabotia species in Botiidae. Keywords Parabotia bimaculata . Botiinae . Mitochondrial genome . Phylogenetics
Introduction As a riverine loach, Parabotia bimaculata is a typical smallbodied freshwater fish, which only distributed in the southwest China (Chen 1998). P. bimaculata is also a rare and endemic fish species of the upper Yangtze River basin (Chen 1998), the type locality is the town of Luxian, located in the north of Luzhou city, Sichuan province. Like many fishes, P. bimaculata favors clear, well-oxygenated, flowing water with substrates of rocks or gravel and it’s intolerant to the Electronic supplementary material The online version of this article (https://doi.org/10.1007/s41208-020-00200-4) contains supplementary material, which is available to authorized users. * Yanjun Shen [email protected] * Fubin Zhang [email protected] 1
Chongqing Key Laboratory of Animal Biology, School of Life Sciences, Chongqing Normal University, Chongqing 401331, China
2
Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China
3
College of Environmental Science and Engineering; Southwest Branch of the National Freshwater Fishery Engineering Technology Research Center (Wuhan), China West Normal University, Nanchong 637009, Sichuan Province, China
accumulation of organic wastes and requires spotless water at all times in order to thrive (Chen 1980). It also does best if there is a high level of dissolved oxygen and a decent level of water movement in the habitat environment. However, its wild resources have been decreased due to massive water conservancy constructions, severe environmental contamination and other factors in recent years. Therefore, it can be used as a biological indicator of the quality of the water environment (Roberts 2005; Authman et al. 2015). The genus Parabotia was described in 1872 (Dabry de Thiersant). Currently, there are about 13 valid species based on Fishbase statistic (Froese and D 2018). However, it is not easy to distingui
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