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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 41, No. 3, 2020, pp. 328-340
Bioline Code: zr20034
Full paper language: English
Document type: Special Article
Document available free of charge

Zoological Research, Vol. 41, No. 3, 2020, pp. 328-340

 en Whole-genome sequencing of leopard coral grouper ( Plectropomus leopardus check for this species in other resources ) and exploration of regulation mechanism of skin color and adaptive evolution
Yang, Yang; Wu, Li-Na; Chen, Jing-Fang; Wu, Xi; Xia, Jun-Hong; Meng, Zi-Ning; Liu, Xiao-Chun & Lin, Hao-Ran

Abstract

Leopard coral groupers belong to the Plectropomus genus of the Epinephelidae family and are important fish for coral reef ecosystems and the marine aquaculture industry. To promote future research of this species, a high-quality chromosome-level genome was assembled using PacBio sequencing and Hi-C technology. A 787.06 Mb genome was assembled, with 99.7% (784.57 Mb) of bases anchored to 24 chromosomes. The leopard coral grouper genome size was smaller than that of other groupers, which may be related to its ancient status among grouper species. A total of 22 317 protein-coding genes were predicted. This high-quality genome of the leopard coral grouper is the first genomic resource for Plectropomus and should provide a pivotal genetic foundation for further research. Phylogenetic analysis of the leopard coral grouper and 12 other fish species showed that this fish is closely related to the brown-marbled grouper. Expanded genes in the leopard coral grouper genome were mainly associated with immune response and movement ability, which may be related to the adaptive evolution of this species to its habitat. In addition, we also identified differentially expressed genes (DEGs) associated with carotenoid metabolism between red and brown-colored leopard coral groupers. These genes may play roles in skin color decision by regulating carotenoid content in these groupers.

Keywords
Leopard  coral  grouper; Genome; Evolution; Skin color; Immune

 
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