A draft genome of the neritid snail Theodoxus fluviatilis

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Fuchs, Laura Iris Regina (author)

A draft genome of the neritid snail Theodoxus fluviatilis

Article/chapterEnglish2023

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2023
2023
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LIBRIS-ID:oai:DiVA.org:su-226120
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-226120URI
https://doi.org/10.1093/g3journal/jkad282DOI

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Language:English
Summary in:English

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The neritid snail Theodoxus fluviatilis is found across habitats differing in salinity, from shallow waters along the coast of the Baltic Sea to lakes throughout Europe. Living close to the water surface makes this species vulnerable to changes in salinity in their natural habitat, and the lack of a free-swimming larval stage limits this species’ dispersal. Together, these factors have resulted in a patchy distribution of quite isolated populations differing in their salinity tolerances. In preparation for investigating the mechanisms underlying the physiological differences in osmoregulation between populations that cannot be explained solely by phenotypic plasticity, we present here an annotated draft genome assembly for T. fluviatilis, generated using PacBio long reads, Illumina short reads, and transcriptomic data. While the total assembly size (1045 kb) is similar to those of related species, it remains highly fragmented (N scaffolds = 35,695; N50 = 74 kb) though moderately high in complete gene content (BUSCO single copy complete: 74.3%, duplicate: 2.6%, fragmented: 10.6%, missing: 12.5% using metazoa n = 954). Nevertheless, we were able to generate gene annotations of 21,220 protein-coding genes (BUSCO single copy complete: 65.1%, duplicate: 16.7%, fragmented: 9.1%, missing: 9.1% using metazoa n = 954). Not only will this genome facilitate comparative evolutionary studies across Gastropoda, as this is the first genome assembly for the basal snail family Neritidae, it will also greatly facilitate the study of salinity tolerance in this species. Additionally, we discuss the challenges of working with a species where high molecular weight DNA isolation is very difficult.

Subject headings and genre

NATURVETENSKAP Biologi Evolutionsbiologi hsv//swe
NATURAL SCIENCES Biological Sciences Evolutionary Biology hsv//eng
genome
neritid snail
Theodoxus fluviatilis
osmotolerance
changes in environmental salinity
ecotypes

Added entries (persons, corporate bodies, meetings, titles ...)

Knobloch, Jan (author)
Wiesenthal, Amanda Alice (author)
Fuss, Janina (author)
Franzenburg, Soeren (author)
Oliva, Montserrat Torres (author)
Müller, Christian (author)
Wheat, Christopher W.,1972-Stockholms universitet,Zoologiska institutionen(Swepub:su)cwhea (author)
Hildebrandt, Jan-Peter (author)
Stockholms universitetZoologiska institutionen (creator_code:org_t)

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In:G32160-1836

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By the author/editor: Fuchs, Laura Iri ...; Knobloch, Jan; Wiesenthal, Aman ...; Fuss, Janina; Franzenburg, Soe ...; Oliva, Montserra ...; show more...; Müller, Christia ...; Wheat, Christoph ...; Hildebrandt, Jan ...; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Evolutionary Bio ...

Articles in the publication: G3

By the university: Stockholm University

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