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Complete mitochondrial genome of the branching octocoral Paramuricea grayi (Johnson, 1861), phylogenetic relationships and divergence analysis
Publication . Coelho, Márcio A. G.; Ledoux, Jean-Baptiste; Boavida, Joana; Paulo, Diogo; Gómez-Gras, Daniel; Bensoussan, Nathaniel; López-Sendino, Paula; Cerrano, Carlo; Kipson, Silvija; Bakran-Petricioli, Tatjana; Garrabou, Joaquim; EA, Serrao; Pearson, Gareth Anthony
The Gray’s sea fan, Paramuricea grayi (Johnson, 1861), typically inhabits deep littoral and circalittoral
habitats of the eastern temperate and tropical Atlantic Ocean. Along the Iberian Peninsula, where
P. grayi is a dominant constituent of circalittoral coral gardens, two segregating lineages (yellow and
purple morphotypes) were recently identified using single-copy nuclear orthologues. The mitochondrial
genomes of 9 P. grayi individuals covering both color morphotypes were assembled from RNA-seq
data, using samples collected at three sites in southern (Sagres and Tavira) and western (Cape
Espichel) Portugal. The complete circular mitogenome is 18,668 bp in length, has an A þ T-rich base
composition (62.5%) and contains the 17 genes typically found in Octocorallia: 14 protein-coding genes
(atp6, atp8, cob, cox1-3, mt-mutS, nad1-6, and nad4L), the small and large subunit rRNAs (rns and rnl),
and one transfer RNA (trnM). The mitogenomes were nearly identical for all specimens, though we
identified a noteworthy polymorphism (two SNPs 9 bp apart) in the mt-mutS of one purple individual
that is shared with the sister species P. clavata. The mitogenomes of the two species have a pairwise
sequence identity of 99.0%, with nad6 and mt-mutS having the highest rates of non-synonymous
substitutions.
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Fundação para a Ciência e a Tecnologia
Programa de financiamento
3599-PPCDT
Número da atribuição
PTDC/BIA-CBI/6515/2020