Whole mitogenome analysis of endangered freshwater catfish Horabagrus nigricollaris

Q3 Agricultural and Biological Sciences Ecological Genetics and Genomics Pub Date : 2025-03-01 Epub Date: 2025-02-06 DOI:10.1016/j.egg.2025.100335

V.J. Rejish Kumar , S. Chandhini , V.M. Arjunan , P.H. Anvar Ali

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Abstract

The genus Horabagrus comprised of two species of freshwater catfish endemic to peninsular India, H. brachysoma and H. nigricollaris. Compared to H. brachysoma, H. nigricollaris (black collared catfish) distribution is very much limited and the species is under the threat of extinction. In the present study we have sequenced and analysed the complete mitochondrial genome of H. nigricollaris. The mitochondrial genome is 16561 bp in length that consisted of 13 protein-coding genes, 22 tRNAs, 2 rRNA genes with a control region (D-loop). The overall base composition was A: 31.3 %, T: 25.4 %, G: 15.2 % and C: 28 %. Most frequently used codon was CUA which codes for the amino acid Leucine. Comparative analysis of H. nigricollaris mitogenome demonstrated a close similarity with its sister species H. brachysoma in composition, gene order and orientation. The mitogenome characterised in this study can form a primary genomic resource for further research on this endangered catfish.

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濒危淡水鲶鱼黑斑鲶鱼全有丝分裂基因组分析

Horabagrus属由印度半岛特有的两种淡水鲶鱼组成：H. brachysoma和H. nigricollaris。与短颈鲶鱼相比，黑领鲶鱼的分布非常有限，濒临灭绝。在目前的研究中我们有完整的线粒体基因组的测序和分析h . nigricollaris。线粒体基因组全长16561 bp，由13个蛋白编码基因、22个trna、2个rRNA基因和一个控制区（D-loop）组成。总碱基组成为A: 31.3%, T: 25.4%, G: 15.2%, C: 28%。最常用的密码子是编码氨基酸亮氨酸的CUA。比较分析h . nigricollaris mitogenome演示了一个与它的姐妹密切相似物种h . brachysoma组成、基因顺序和方向。本研究表征的有丝分裂基因组可以为进一步研究这种濒危鲶鱼提供主要的基因组资源。

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来源期刊

Ecological Genetics and Genomics Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics

CiteScore

1.80

自引率

0.00%

发文量

期刊介绍： Ecological Genetics and Genomics publishes ecological studies of broad interest that provide significant insight into ecological interactions or/ and species diversification. New data in these areas are published as research papers, or methods and resource reports that provide novel information on technologies or tools that will be of interest to a broad readership. Complete data sets are shared where appropriate. The journal also provides Reviews, and Perspectives articles, which present commentary on the latest advances published both here and elsewhere, placing such progress in its broader biological context. Topics include: -metagenomics -population genetics/genomics -evolutionary ecology -conservation and molecular adaptation -speciation genetics -environmental and marine genomics -ecological simulation -genomic divergence of organisms