Genetic divergence outpaces phenotypic evolution among threespine stickleback populations in old freshwater habitats.

ABSTRACT: Species such as threespine stickleback (Gasterosteus aculeatus) that inhabit divergent selective environments and that have diversified on different time scales can be of value for understanding evolutionary processes. Here we synthesize high-resolution genotypic and phenotypic data to explore a largely unstudied distribution of threespine stickleback populations living in oceanic and freshwater habitats along coastal and inland regions of Oregon. Many inland aquatic habitats of Oregon remained unglaciated during the last ice age, meaning that some extant Oregon lake and river stickleback may have descended from freshwater populations established long before more well-studied, post-glacial freshwater populations. To address the degree of congruence between genetic and phenotypic div

SUBMITTER: Currey MC 

PROVIDER: S-EPMC9957565 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature