A phylogenetic backbone for Bivalvia: an RNA-seq approach

作者：Gonzalez Vanessa L; Andrade Sonia C S; Bieler Ruediger; Collins Timothy M; Dunn Casey W; Mikkelsen Paula M; Taylor John D; Giribet Gonzalo^*

来源：Proceedings of the Royal Society B, 2015, 282(1801): UNSP 20142332.

DOI：10.1098/rspb.2014.2332

• phylogenomics
• mollusca
• bivalves
• phylogenetics

Bivalves are an ancient and ubiquitous group of aquatic invertebrates with an estimated 10000-20000 living species. They are economically significant as a human food source, and ecologically important given their biomass and effects on communities. Their phylogenetic relationships have been studied for decades, and their unparalleled fossil record extends from the Cambrian to the Recent. Nevertheless, a robustly supported phylogeny of the deepest nodes, needed to fully exploit the bivalves as a model for testing macroevolutionary theories, is lacking. Here, we present the first phylogenomic approach for this important group of molluscs, including novel transcriptomic data for 31 bivalves obtained through an RNA-seq approach, and analyse these data with published genomes and transcriptomes of other bivalves plus outgroups. Our results provide a well-resolved, robust phylogenetic backbone for Bival-via with all major lineages delineated, addressing long-standing questions about the monophyly of Protobranchia and Heterodonta, and resolving the position of particular groups such as Palaeoheterodonta, Archiheterodonta and Anomalodesmata. This now fully resolved backbone demonstrates that genomic approaches using hundreds of genes are feasible for resolving phylogenetic questions in bivalves and other animals.

• 出版日期2015-2-22