Industrial perspective: propagation, phenotypic characteristics, and varieties of the domesticated discus fish (Symphysodon spp.)

Ng, Tian Tsyh; Tan, Min Pau; Danish-Daniel, Muhd; Sorgeloos, Patrick; Lau, Cher Chien; Sung, Yeong Yik

doi:10.1007/s10499-023-01215-3

Aquacult Int

2023

DOI: 10.1007/s10499-023-01215-3

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Industrial perspective: propagation, phenotypic characteristics, and varieties of the domesticated discus fish (Symphysodon spp.)

Tian Tsyh Ng

Min Pau Tan

Muhd Danish-Daniel

et al.

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2024

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Comparative Transcriptome Analysis Reveals Differential Cutaneous Gene Expression in the Color Variation of Two Ornamental Discus, Red Melon and Red Cover

Ng,

Lau,

Tan

et al. 2024

Pigment Cell Melanoma Res

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Red Melon (RM) and Red Cover (RC) discus (Symphysodon spp.) are ornamental fish varieties that were selectively bred from the wild parental lineages of the brown discus S. aquafaciatus over many generations, resulting in distinct cutaneous patterns from juveniles to adults. To better understand the underlying mechanisms, skin samples were collected from juveniles aged 60 days and adults aged 1 year from RM and RC for investigations. Microscopic observation detected xanthophores and erythrophores in all samples, except RC juveniles with no erythrophores. Melanophores were presented only in RC. The comparative analysis revealed that genes involved in pteridine synthesis (gch1 and zgc:153031), one‐carbon metabolism (aldh1l2 and zgc153031), and lipid metabolism (apoda and klf1) were differentially expressed in RM juveniles, which may be associated with the development of erythrophores and xanthophores. The temporal inhibition of melanophore differentiation and development was observed in RM juveniles, coupled with elevated expression of notum2 and sost, two antagonist genes in Wnt‐signaling, suggesting their roles in melanophore development. Distinct pigment pattern between RM and RC since the juvenile stage may be driven by the differential expression of multiple axial developmental genes, including GATA, ankyrin, and mitotic spindle orientation proteins. This is the first report to describe the differential growth of cutaneous pigments and the molecular processes involved in red discus. The results provided valuable insights into pigment pattern differences in an interesting ornamental fish model.

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Comparative Transcriptome Analysis Reveals Differential Cutaneous Gene Expression in the Color Variation of Two Ornamental Discus, Red Melon and Red Cover

Ng,

Lau,

Tan

et al. 2024

Pigment Cell Melanoma Res

View full text Add to dashboard Cite

show abstract

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Industrial perspective: propagation, phenotypic characteristics, and varieties of the domesticated discus fish (Symphysodon spp.)

Cited by 1 publication

References 79 publications

Comparative Transcriptome Analysis Reveals Differential Cutaneous Gene Expression in the Color Variation of Two Ornamental Discus, Red Melon and Red Cover

Comparative Transcriptome Analysis Reveals Differential Cutaneous Gene Expression in the Color Variation of Two Ornamental Discus, Red Melon and Red Cover

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