Whole-Genome Resequencing Reveals Signatures of Adaptive Evolution in <i>Acanthopagrus latus</i> and <i>Rhabdosargus sarba</i>
2024
Jingyu Yang | Zizi Cai | Yan Fang | Binbin Shan | Ran Zhang | Longshan Lin | Yuan Li | Jing Zhang
<i>Acanthopagrus latus</i> and <i>Rhabdosargus sarba</i> are economically important marine species along the coast of China, with similar external morphological characteristics and living habits, with wide distribution and strong adaptability. To investigate the molecular mechanisms underlying the adaptive evolution of these two species, we conducted whole-genome resequencing of 10 individuals of both species from the coastal waters of Wuyu Island, Fujian, China, using high-throughput sequencing technology. We obtained SNP, InDel, CNV, and SV variation information and annotated these variations, constructing a genomic variation database for both species. By comparing the resequencing data with reference genomes, we identified 9,829,511 SNP loci in the population of <i>A. latus</i> and 34,051,056 SNP loci in the population of <i>R. sarba</i>. Using whole-genome SNP data, we employed Fst and ROD methods to identify candidate genomic regions under selection. Functional annotation and enrichment analysis using GO and KEGG databases revealed potential adaptive evolution in <i>R. sarba</i> associated with immune response, feeding, growth and development, and locomotion, while <i>A. latus</i> showed potential adaptive evolution associated with immune response, nervous system, growth and development, and metabolism.
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