Transcriptome analysis reveals the candidate genes associated with skin color variation in Luciobarbus capito
文献类型： 外文期刊
第一作者： Geng, Longwu
作者： Geng, Longwu;Shang, Xinchi;Wei, Haijun;Tong, Guangxiang;Xu, Wei;Kuang, Youyi;Geng, Longwu;Shang, Xinchi;Wei, Haijun;Tong, Guangxiang;Xu, Wei;Kuang, Youyi
作者机构：
关键词： Transcriptomics; Pigmentation; Melanin; Carotenoids; Luciobarbus capito
期刊名称：AQUACULTURE REPORTS （ 影响因子：3.7； 五年影响因子：4.0 ）
ISSN： 2352-5134
年卷期： 2025 年 43 卷
页码：
收录情况： SCI
摘要： The wild Luciobarbus capito exhibits gray-black dorsal and silvery-white abdomen. Recently, a few cultured individuals developed yellow mutation. The yellow Aral barbel represents a valuable germplasm resource due to its stable genetic body color and high consumer preference due to the color and market value. However, the genetic mechanism underlying this color variation remain unknown. To investigate the molecular mechanisms of body color variation in L. capito, we conducted comparative transcriptome analysis on skin samples from two distinct color morphs. The experimental fish were offspring of a yellow male (male) and a black female (female), with a phenotypic ratio of 1:1 (black: yellow). The transcriptome results revealed that 855 differentially expressed genes were identified. Of these, 659 genes were significantly down-regulated in yellow skin, and 196 genes were significantly up-regulated in yellow skin. The patterns of expression of 12 randomly selected differentially expressed genes were confirmed by the quantitative real-time PCR analysis between two color skin. Among the DEGs, six genes (ywhae, c3, cdk4, mt-atp6, rhoa, and tuba1) were associated with melanin synthesis and transport, functioning through the PI3K/Akt and cAMP signaling pathways. In contrast, two carotenoid-related genes (hpd, pvalb7) were regulated via cysteine and methionine metabolism and phagosome phagocytosis pathways, contributing to xanthophore pigment deposition. This study would be useful for future genetic studies on the pigmentation of skin color variation in L. capito, and it provides a theoretical foundation for genetic improvement of body color stability and consistency in aquaculture.
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