OMIA 000357-8128 : Eye colour in Oreochromis niloticus

In other species: rock pigeon , dog , domestic cat , water buffalo

Mendelian trait/disorder: yes

Considered a defect: unknown

Key variant known: no

Species-specific description: Wang et al. (2021): "We identified 4 types of pigment cells: melanophores, xanthophores, iridophores and erythrophores, and characterized their first appearance in wild-type fish. We mutated 25 genes involved in melanogenesis, pteridine metabolism, and the carotenoid absorption and cleavage pathways. Among the 25 mutated genes, 13 genes had a phenotype in both the F0 and F2 generations. None of F1 heterozygotes had phenotype. By comparing the color pattern of our mutants with that of red tilapia (Oreochromis spp), a natural mutant produced during hybridization of tilapia species, we found that the pigmentation of the body and eye is controlled by different genes. Previously studied genes like mitf, kita/kitlga, pmel, tyrb, hps4, gch2, csf1ra, pax7b, and bco2b were proved to be of great significance for color patterning in tilapia."

Inheritance: CRISPR/Cas9 gene editing was used to create mutations (GMO).

Reference


2021 Wang, C., Lu, B., Li, T., Liang, G., Xu, M., Liu, X., Tao, W., Zhou, L., Kocher, T.D., Wang, D. :
Nile tilapia: A model for studying teleost color patterns. J Hered 112:469-484, 2021. Pubmed reference: 34027978. DOI: 10.1093/jhered/esab018.

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  • Created by Imke Tammen2 on 26 May 2021