• Medientyp: E-Artikel
  • Titel: Genome sequences reveal global dispersal routes and suggest convergent genetic adaptations in seahorse evolution
  • Beteiligte: Li, Chunyan [VerfasserIn]; Olave, Melisa [VerfasserIn]; Hou, Yali [VerfasserIn]; Qin, Geng [VerfasserIn]; Schneider, Ralf F. [VerfasserIn]; Gao, Zexia [VerfasserIn]; Tu, Xialong [VerfasserIn]; Wang, Xin [VerfasserIn]; Qi, Furong [VerfasserIn]; Nater, Alexander [VerfasserIn]; Kautt, Andreas F. [VerfasserIn]; Wan, Shiming [VerfasserIn]; Zhang, Yanhong [VerfasserIn]; Liu, Yali [VerfasserIn]; Zhang, Huixian [VerfasserIn]; Zhang, Bo [VerfasserIn]; Zhang, Hao [VerfasserIn]; Qu, Meng [VerfasserIn]; Liu, Shuaishuai [VerfasserIn]; Chen, Zeyu [VerfasserIn]; Zhong, Jia [VerfasserIn]; Zhang, He [VerfasserIn]; Meng, Lingfeng [VerfasserIn]; Wang, Kai [VerfasserIn]; [...]
  • Erschienen: Nature Research, 2021-02-17
  • Sprache: Englisch
  • DOI: https://doi.org/10.1038/s41467-021-21379-x
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  • Beschreibung: Seahorses have a circum-global distribution in tropical to temperate coastal waters. Yet, seahorses show many adaptations for a sedentary, cryptic lifestyle: they require specific habitats, such as seagrass, kelp or coral reefs, lack pelvic and caudal fins, and give birth to directly developed offspring without pronounced pelagic larval stage, rendering long-range dispersal by conventional means inefficient. Here we investigate seahorses’ worldwide dispersal and biogeographic patterns based on a de novo genome assembly of Hippocampus erectus as well as 358 re-sequenced genomes from 21 species. Seahorses evolved in the late Oligocene and subsequent circum-global colonization routes are identified and linked to changing dynamics in ocean currents and paleo-temporal seaway openings. Furthermore, the genetic basis of the recurring “bony spines” adaptive phenotype is linked to independent substitutions in a key developmental gene. Analyses thus suggest that rafting via ocean currents compensates for poor dispersal and rapid adaptation facilitates colonizing new habitats.
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