Phylogenomics provides new insight into evolutionary relationships and genealogical discordance in the reef-building coral genus Acropora

Natalie L. Rosser, Luke Thomas, Sean Stankowski, Zoe T. Richards, W. Jason Kennington, Michael S. Johnson

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Understanding the genetic basis of reproductive isolation is a long-standing goal of speciation research. In recently diverged populations, genealogical discordance may reveal genes and genomic regions that contribute to the speciation process. Previous work has shown that conspecific colonies of Acropora that spawn in different seasons (spring and autumn) are associated with highly diverged lineages of the phylogenetic marker PaxC. Here, we used 10 034 single-nucleotide polymorphisms to generate a genome-wide phylogeny and compared it with gene genealogies from the PaxC intron and the mtDNA Control Region in 20 species of Acropora, including three species with spring-and autumn-spawning cohorts. The PaxC phylogeny separated conspecific autumn and spring spawners into different genetic clusters in all three species; however, this pattern was not supported in two of the three species at the genome level, suggesting a selective connection between PaxC and reproductive timing in Acropora corals. This genome-wide phylogeny provides an improved foundation for resolving phylogenetic relationships in Acropora and, combined with PaxC, provides a fascinating platform for future research into regions of the genome that influence reproductive isolation and speciation in corals.

    Original languageEnglish
    Article number20162182
    JournalProceedings of the Royal Society B: Biological Sciences
    Volume284
    Issue number1846
    DOIs
    Publication statusPublished - 11 Jan 2017

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