RADseq population genomics confirms divergence across closely related species in blue coral (Heliopora coerulea).

Autor: Iguchi A; Department of Bioresources Engineering, National Institute of Technology, Okinawa College, 905 Henoko, Nago-City, Okinawa, 905-2192, Japan. iguchi.a@aist.go.jp.; Present address: Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 7, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8567, Japan. iguchi.a@aist.go.jp., Yoshioka Y; Department of Bioresources Engineering, National Institute of Technology, Okinawa College, 905 Henoko, Nago-City, Okinawa, 905-2192, Japan., Forsman ZH; Hawai'i Institute of Marine Biology, Kaneohe, HI, USA., Knapp ISS; Hawai'i Institute of Marine Biology, Kaneohe, HI, USA., Toonen RJ; Hawai'i Institute of Marine Biology, Kaneohe, HI, USA., Hongo Y; Research Center for Aquatic Genomics, National Research Institute of Fisheries Science, 2-12-4 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-8648, Japan., Nagai S; Research Center for Aquatic Genomics, National Research Institute of Fisheries Science, 2-12-4 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-8648, Japan., Yasuda N; Department of Marine Biology and Environmental Sciences, Faculty of Agriculture, University of Miyazaki, Gakuen- kibanadai-nishi-1-1, Miyazaki, 889-2192, Japan. nina27@cc.miyazaki-u.ac.jp.
Jazyk: angličtina
Zdroj: BMC evolutionary biology [BMC Evol Biol] 2019 Oct 15; Vol. 19 (1), pp. 187. Date of Electronic Publication: 2019 Oct 15.
DOI: 10.1186/s12862-019-1522-0
Abstrakt: Background: Heliopora coerulea, the blue coral, is the octocoral characterized by its blue skeleton. Recently, two Heliopora species were delimited by DNA markers: HC-A and HC-B. To clarify the genomic divergence of these Heliopora species (HC-A and HC-B) from sympatric and allopatric populations in Okinawa, Japan, we used a high throughput reduced representation genomic DNA sequencing approach (ezRAD).
Results: We found 6742 biallelic SNPs shared among all target populations, which successfully distinguished the HC-A and HC-B species in both the sympatric and allopatric populations, with no evidence of hybridization between the two. In addition, we detected 410 fixed SNPs linking functional gene differences, including heat resilience and reproductive timing, between HC-A and HC-B.
Conclusions: We confirmed clear genomic divergence between Heliopora species and found possible genes related to stress-responses and reproduction, which may shed light on the speciation process and ecological divergence of coral species.
Databáze: MEDLINE
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