High-throughput SNPs dataset reveal restricted population connectivity of marine gastropod within the narrow distribution range of peripheral oceanic islands

Abstract

Molecular studies based on the high resolution genetic markers help us to grasp the factor shaping the genetic structure of marine organisms. Ecological factors linking to life history traits have often explained the process of genetic structuring in open and connectable oceanic environments. Besides, population genetic divergence can be affected by fragmented habitat, oceanic current, and past geographical events. In the present study, we demonstrated the genetic differentiation of marine gastropod Monodonta sp. within a narrow range of peripheral oceanic islands, the Ogasawara Islands. Genetic analyses were performed not only with a mitochondrial DNA marker but also with a high-throughput SNPs dataset obtained by ddRAD-seq. The results of the mtDNA analyses did not show genetic divergence among populations, while the SNPs dataset detected population genetic differentiation. Population demographic analyses and gene flow estimation suggested that the genetic structure was formed by sea level fluctuation associated with the past climatic change and regulated by temporal oceanographic conditions. These findings provide important insights into population genetic patterns in open and connectable environments.

Population genetic and genomic approaches for the management of the blackfoot paua, Haliotis iris Gmelin 1791, within the genus context

“…Nonetheless, all molecular markers are routinely used in population genetics analysis (Wei et al, 2013;Silva & Gardner, 2015;Gwak & Roy, 2021;Saha et al, 2021;Gardner et al, 2022;Zheng et al, 2022;Yamazaki et al, 2022) with some categories (e.g., microsatellites and mtDNA) being more appropriate than others for specific purposes (Tsykun et al, 2017;Hauser et al, 2021;Alam & Pálsson, 2021; Walton et al, 2022).…”