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Published on: July 13, 2016
Cetaceans evolution: insights from the genome sequences of common minke whales
Jung Youn Park1, Yong-Rock An2, Naohisa Kanda3
1Biotechnology Research Division, National Fisheries Research & Development Institute, Gijang gun, Busan, 619-705, Republic of Korea. genome@korea.kr.
Background:
Whales have captivated the human imagination for millennia. These incredible cetaceans are the only mammals that have adapted to life in the open oceans and have been a source of human food, fuel and tools around the globe. The transition from land to water has led to various aquatic specializations related to hairless skin and ability to regulate their body temperature in cold water.
Results:
We present four common minke whale (Balaenoptera acutorostrata) genomes with depth of ×13 ~ ×17 coverage and perform resequencing technology without a reference sequence. Our results indicated the time to the most recent common ancestors of common minke whales to be about 2.3574 (95% HPD, 1.1521 - 3.9212) million years ago. Further, we found that genes associated with epilation and tooth-development showed signatures of positive selection, supporting the morphological uniqueness of whales.
Conclusions:
This whole-genome sequencing offers a chance to better understand the evolutionary journey of one of the largest mammals on earth.
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