Seascape genomics reveals adaptive divergence in a connected and commercially important mollusc, the greenlip abalone (Haliotis laevigata), along a longitudinal environmental gradient

摘要: Populations of broadcast spawning marine organisms often have large sizes and are exposed to reduced genetic drift. Under such scenarios, strong selection associated with spatial environmental heterogeneity is expected drive localized adaptive divergence, even in the face connectivity. We tested this hypothesis using a seascape genomics approach commercially important greenlip abalone (Haliotis laevigata). assessed how its population structure has been influenced by along zonal coastal boundary southern Australia linked oceanographic Our data sets include 9,109 filtered SNPs for 371 abalones from 13 localities mapping across ~800 km. Genotype-environment association analyses outlier tests defined 8,786 putatively neutral 323 candidate loci. From perspective, species better represented metapopulation very low differentiation (global FST  = 0.0081) weak isolation distance following stepping-stone model. For loci, however, model-based model-free approaches indicated five divergent clusters. After controlling distance, distribution variation was strongly correlated minimum sea surface temperature oxygen concentration. Around 80 candidates were annotated genes functions related high and/or tolerance, including that influence resilience found other biogeographic regions. study includes documented example about uptake genomic information fisheries management supports divergence due connected spawner.