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Gigascience
2016 May 10;5:20. doi: 10.1186/s13742-016-0125-6.
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Low coverage sequencing of three echinoderm genomes: the brittle star Ophionereis fasciata, the sea star Patiriella regularis, and the sea cucumber Australostichopus mollis.
Long KA
,
Nossa CW
,
Sewell MA
,
Putnam NH
,
Ryan JF
.
Abstract
BACKGROUND: There are five major extant groups of Echinodermata: Crinoidea (feather stars and sea lillies), Ophiuroidea (brittle stars and basket stars), Asteroidea (sea stars), Echinoidea (sea urchins, sea biscuits, and sand dollars), and Holothuroidea (sea cucumbers). These animals are known for their pentaradial symmetry as adults, unique water vascular system, mutable collagenous tissues, and endoskeletons of high magnesium calcite. To our knowledge, the only echinoderm species with a genome sequence available to date is Strongylocentrotus pupuratus (Echinoidea). The availability of additional echinoderm genome sequences is crucial for understanding the biology of these animals.
FINDINGS: Here we present assembled draft genomes of the brittle star Ophionereis fasciata, the sea star Patiriella regularis, and the sea cucumber Australostichopus mollis from Illumina sequence data with coverages of 12.5x, 22.5x, and 21.4x, respectively.
CONCLUSIONS: These data provide a resource for mining gene superfamilies, identifying non-coding RNAs, confirming gene losses, and designing experimental constructs. They will be important comparative resources for future genomic studies in echinoderms.
Fig. 1. Photos of the echinoderm species whose genomes were sequenced in this study (a) Australostichopus mollis, commonly known as the brown sea cucumber; (b) the brittle star Ophionereis fasciata (b), and Patiriella regularis, known as the New Zealand common cushion star. Photo credits: (a) John A. Starmer, (b) Jennifer Howe, Victoria University of Wellington, and (c) username kiwi_kid on flickr (http://tinyurl.com/pregularis)
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