Phylogenetic and Comparative Genomics Study of Cephalopina titillator Based on Mitochondrial Genomes
文献类型： 外文期刊
第一作者： Yao, Huaibing
作者： Yao, Huaibing;Yan, Yuanyuan;Li, Yang;Cui, Weidong;Zhan, Faqiang;Hou, Min;Ma, Wanpeng;Su, Zhanqiang;Yang, Jie;Zhan, Faqiang
作者机构：
关键词：
camel nasal botfly;
期刊名称：INSECTS （ 影响因子：2.9； 五年影响因子：3.3 ）
ISSN：
年卷期： 2025 年 16 卷 1 期
页码：
收录情况： SCI
摘要： Camel bot fly (Cephalopina titillator) larvae cause myiasis in domesticated and wild camels, resulting in significant economic losses to the camel industry and posing a serious global public health concern. To date, only one mitochondrial genome (mitogenome) of C. titillator isolated from the Alxa Bactrian camel has been reported. Herein, C. titillator was isolated from the Junggar Bactrian camel to assemble a complete circular mitogenome with a length of 16,552 bp encoding 13 protein-coding genes, 22 tRNA genes, and two rRNA genes. The mitogenome showed a high A + T content (73.31%), positive AT-skew (0.12), and negative GC-skew (-0.34) base composition patterns. All protein-coding genes (PCGs) employed ATG, ATA, ATT, GTG, or TCG as the start codons and TAA, TAG, or single T as the stop codons. Similar to other parasites in the Oestridae subfamily, the mitogenome was structurally conserved, with genes retaining the same order and direction as those in the ancestral insect mitogenome. The phylogenetic analysis clustered this species with the Oestrinae, showing that the subfamily did not exhibit monophyly. C. titillator isolated from the Junggar Bactrian camel was found to be a sister lineage to that isolated from the Alxa Bactrian camel. Despite the lack of data on the mitogenome of C. titillator isolated from dromedaries in the Middle East, phylogenetic analysis of C. titillator isolated from Xinjiang revealed one distinct lineage of the Xinjiang camel nasal bot fly. In conclusion, this study reports the complete mitogenome of Xinjiang C. titillator for the first time, providing valuable data for future studies on the phylogenetic relationships in this subfamily.
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