Zhou Yicheng, Deng Binhua, Lin Shengyue, Ye Shuzheng, Zheng Peng, Cai Guojun, Liang Weiqian, Han Chong, Li Qiang
School of Life Sciences, Guangzhou University, Guangzhou 510006, China.
Life (Basel). 2025 Jul 22;15(8):1156. doi: 10.3390/life15081156.
var. , an endemic fish in southern China, is a natural triploid crucian carp mutant. In this study, the characteristics of mitochondrial DNA sequences were analyzed to understand their taxonomic status and genetic background at the gene level. The complete mitochondrial genome of var. (length, 16,580 bp) comprises 37 genes (13 protein-coding genes, 22 transfer RNA (tRNAs) genes, and 2 ribosomal RNA (rRNAs) genes) and a non-coding control region. The RSCU of the mtDNA of was similar. Ka/Ks analyses showed the ND4 gene had the highest evolutionary rate. Moreover, the whole mitogenome sequences and D-loop region were employed to examine phylogenetic relationships among var. and other closely related species. The result indicated that clustered with and divided into four clades, providing new insights and data support for the taxonomic status of .
变种，一种中国南方的本地鱼类，是天然三倍体鲫鱼突变体。在本研究中，分析了线粒体DNA序列的特征，以在基因水平上了解它们的分类地位和遗传背景。变种的完整线粒体基因组（长度为16,580 bp）由37个基因组成（13个蛋白质编码基因、22个转运RNA（tRNA）基因和2个核糖体RNA（rRNA）基因）以及一个非编码控制区。变种线粒体DNA的相对同义密码子使用度（RSCU）相似。Ka/Ks分析表明，ND4基因具有最高的进化速率。此外，利用整个线粒体基因组序列和D环区域来研究变种与其他近缘物种之间的系统发育关系。结果表明，变种与[具体物种名称1]聚类，并将[具体物种名称2]分为四个分支，为[具体物种名称2]的分类地位提供了新的见解和数据支持。
