Diversity, distribution, and significance of transposable elements in the genome of the only selfing hermaphroditic vertebrate Kryptolebias marmoratus

The Kryptolebias marmoratus is unique because it is the only self-fertilizing hermaphroditic vertebrate, known to date. It primarily reproduces by internal self-fertilization in a mixed ovary/testis gonad. Here, we report on a high-quality genome assembly for the K. marmoratus South Korea (SK) strai...

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Published in:Scientific reports 2017-01, Vol.7 (1), p.40121-40121, Article 40121
Main Authors: Rhee, Jae-Sung, Choi, Beom-Soon, Kim, Jaebum, Kim, Bo-Mi, Lee, Young-Mi, Kim, Il-Chan, Kanamori, Akira, Choi, Ik-Young, Schartl, Manfred, Lee, Jae-Seong
Format: Article
Language:English
Subjects:
45/43
631/158/2464
631/181/2474
631/601/2722
Animals
Cyprinodontiformes - genetics
DNA Transposable Elements
Ecological adaptation
Evolution, Molecular
Fertilization
Genome
Genomes
Humanities and Social Sciences
Life cycles
Mating
multidisciplinary
Recombination
Recombination, Genetic
Science
Science (multidisciplinary)
Self-fertilization
Sequence Analysis, DNA
Vertebrates
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Summary:The Kryptolebias marmoratus is unique because it is the only self-fertilizing hermaphroditic vertebrate, known to date. It primarily reproduces by internal self-fertilization in a mixed ovary/testis gonad. Here, we report on a high-quality genome assembly for the K. marmoratus South Korea (SK) strain highlighting the diversity and distribution of transposable elements (TEs). We find that K. marmoratus genome maintains number and composition of TEs. This can be an important genomic attribute promoting genome recombination in this selfing fish, while, in addition to a mixed mating strategy, it may also represent a mechanism contributing to the evolutionary adaptation to ecological pressure of the species. Future work should help clarify this point further once genomic information is gathered for other taxa of the family Rivulidae that do not self-fertilize. We provide a valuable genome resource that highlights the potential impact of TEs on the genome evolution of a fish species with an uncommon life cycle.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep40121