The quagga mussel genome and the evolution of freshwater tolerance

Calcino, Andrew D., de Oliveira, André Luiz, Simakov, Oleg, Schwaha, Thomas, Zieger, Elisabeth, Wollesen, Tim, and Wanninger, Andreas (2019) The quagga mussel genome and the evolution of freshwater tolerance. DNA Research, 26 (5). pp. 411-422.

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Freshwater dreissenid mussels evolved from marine ancestors during the Miocene ∼30 million years ago and today include some of the most successful and destructive invasive species of freshwater environments. Here, we sequenced the genome of the quagga mussel Dreissena rostriformis to identify adaptations involved in embryonic osmoregulation. We provide evidence that a lophotrochozoan-specific aquaporin water channel, a vacuolar ATPase subunit and a sodium/hydrogen exchanger are involved in osmoregulation throughout early cleavage, during which time large intercellular fluid-filled 'cleavage cavities' repeatedly form, coalesce and collapse, expelling excess water to the exterior. Independent expansions of aquaporins coinciding with at least five freshwater colonization events confirm their role in freshwater adaptation. Repeated aquaporin expansions and the evolution of membrane-bound fluid-filled osmoregulatory structures in diverse freshwater taxa point to a fundamental principle guiding the evolution of freshwater tolerance and provide a framework for future species control efforts.

Item ID: 80438
Item Type: Article (Research - C1)
ISSN: 1756-1663
Keywords: Dreissena ; aquaporin; genome; osmoregulation; quagga
Copyright Information: © The Author(s) 2019. Published by Oxford University Press on behalf of Kazusa DNA Research Institute. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Date Deposited: 14 Sep 2023 03:08
FoR Codes: 31 BIOLOGICAL SCIENCES > 3105 Genetics > 310509 Genomics @ 50%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310404 Evolution of developmental systems @ 50%
SEO Codes: 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280102 Expanding knowledge in the biological sciences @ 100%
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