Phylogeography of the Northern Atlantic species Chondrus crispus (Gigartinales, Rhodophyta) inferred from nuclear rDNA internal transcribed spacer sequences

Hu, Zi‐Min; Zeng, Xiaoqi; Critchley, Alan T.; Morrell, Steve L.; Duan, Delin

doi:10.1007/s10750-006-0381-z

Cited by 12 publications

(8 citation statements)

References 41 publications

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“…Two primer sets, Cox3F (5 0 -AHRGTTCAACGA-CAYCCATTTC-3 0 ; designed in this study) and CAR4A (5 0 -CCCCACCARTAWATNGTNAG-3 0 ; Kogame et al, 2005), ITS2FC2 (5 0 -TTGTCGGGGAGGAGGAGG-3 0 ; Cheang et al, 2010) and 25BR2 (5 0 -TCCTCCGCTTAGTATATGCTTAA-3 0 ; Yoshida et al, 2000), were used to amplify mitochondrial cox3 and nuclear ITS2 respectively. PCR, electrophoresis and sequencing were conducted following our previous protocols (Hu et al, 2007(Hu et al, , 2011.…”

Section: Sample Collection Dna Extraction Pcr and Sequencingmentioning

confidence: 99%

Oceanic currents drove population genetic connectivity of the brown alga Sargassum thunbergii in the north‐west Pacific

Gao

et al. 2016

Journal of Biogeography

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Aim Oceanic currents are among the most pervasive hydrodynamic features in shaping community dynamics, population connectivity and phylogeographical structure of intertidal species. Here, we test whether population structure and biogeographical gradients of genetic diversity in the brown alga Sargassum thunbergii are correlated with oceanic currents in the north-west Pacific (NWP).Location North-west Pacific (25.07°N-43.36°N).Methods Nuclear internal transcribed spacer-2 and mitochondrial cox3 sequences were obtained from 835 and 810 individuals of S. thunbergii respectively. Parsimony networks and phylogenetic trees (maximum parsimony and Bayesian inference) were constructed to evaluate phylogeographical structure. Pairwise F ST estimates and analyses of molecular variance (AMOVA) at various hierarchical levels (latitude, longitude, marine provinces, biogeographical basins and zoogeographical zones) were conducted to elucidate population genetic differentiation. migrate software was used to estimate the number of migrants between adjacent populations.Results Several lines of evidence indicate that S. thunbergii is characterized by shallow population structure. Geographical distances do not correlate with population pairwise genetic differentiations. The corridor/stepping-stone model-based coalescent analyses reveal high levels of asymmetric gene flow among S. thunbergii populations, with the numbers of migrants largely corresponding to the directions of oceanic current systems in the NWP. Genetic signatures also indicate that Jeju Island, Korea might act as a transition zone for dispersal of S. thunbergii in the NWP driven by the Kuroshio Current, thus facilitating subsequent transportation northward into the Sea of Japan and the Yellow-Bohai Sea.Main conclusions Population genetic homogeneity in S. thunbergii was mainly structured by oceanic currents rather than palaeoclimatic events. Our study illustrates an important phylogeographical case of how coastal hydrodynamic factors contributed to population connectivity and geographical shifts of genetic diversity for marine organisms without a pelagic stage.

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Section: Sample Collection Dna Extraction Pcr and Sequencingmentioning

confidence: 99%

Oceanic currents drove population genetic connectivity of the brown alga Sargassum thunbergii in the north‐west Pacific

Gao

et al. 2016

Journal of Biogeography

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“…2008). One previous study interpreted the contemporary distribution of C. crispus in the North Atlantic based on the theory of continental drift (Hu et al. 2007b).…”

Section: Diversity Measurements For Populations Of Chondrus Crispus mentioning

confidence: 99%

“…Finally, restricted gene flow among C. crispus populations makes it potentially easier to follow the genetic signature of post-Pleistocene recolonization (Wang et al 2008). One previous study interpreted the contemporary distribution of C. crispus in the North Atlantic based on the theory of continental drift (Hu et al 2007b). The small sample size for each locality reduced the validity of this hypothesis.…”

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Phylogeographic Patterns Indicate Transatlantic Migration From Europe to North America in the Red Seaweed Chondrus Crispus (Gigartinales, Rhodophyta)1

Guiry

Critchley

et al. 2010

Journal of Phycology

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Inferring how the Pleistocene climate oscillations have repopulated the extant population structure of Chondrus crispus Stackh. in the North Atlantic Ocean is important both for our understanding of the glacial episode promoting diversification and for the conservation and development of marine organisms. C. crispus is an ecologically and commercially important red seaweed with broad distributions in the North Atlantic. Here, we employed both partial mtDNA Cox1 and nrDNA internal transcribed spacer region 2 (ITS2) sequences to explore the genetic structure of 17 C. crispus populations from this area. Twenty‐eight and 30 haplotypes were inferred from these two markers, respectively. Analysis of molecular variance (AMOVA) and of the population statistic ΦST not only revealed significant genetic structure within C. crispus populations but also detected significant levels of genetic subdivision among and within populations in the North Atlantic. On the basis of high haplotype diversity and the presence of endemic haplotypes, we postulate that C. crispus had survived in Pleistocene glacial refugia in the northeast Atlantic, such as the English Channel and the northwestern Iberian Peninsula. We also hypothesize that C. crispus from the English Channel refugium repopulated most of northeastern Europe and recolonized northeastern North America in the Late Pleistocene. The observed phylogeographic pattern of C. crispus populations is in agreement with a scenario in which severe Quaternary glaciations influenced the genetic structure of North Atlantic marine organisms with contiguous population expansion and locally restricted gene flow coupled with a transatlantic dispersal in the Late Pleistocene.

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“…For example, interfertility was demonstrated in Chondrus crispus from the east and west Atlantic coasts (Guiry, 1981(Guiry, , 1992 based on the ITS1 sequence data, the genetic distance was not to be correlated with the geographic distance at all, and hence, multiple transatlantic dispersal was suggested (Hu et al, 2007). Interfertility between geographically distant populations was also demonstrated in Bostrychia radicans from both sides of South America (Pacific Mexico vs. Venezuela, or Peru vs. Brazil), and there were only a few site changes at the Rubisco spacer plus the flanking genetic region among these interfertile strains (Zuccarello and West, 1997).…”

Section: Relationships Between Reproductive Affinities Geographic DImentioning

confidence: 99%

Investigations on Reproductive Affinities in Red Algae

Kamiya

West

2010

Cellular Origin, Life in Extreme Habitats and Astrobiology

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Phylogeography of the Northern Atlantic species Chondrus crispus (Gigartinales, Rhodophyta) inferred from nuclear rDNA internal transcribed spacer sequences

Cited by 12 publications

References 41 publications

Oceanic currents drove population genetic connectivity of the brown alga Sargassum thunbergii in the north‐west Pacific

Oceanic currents drove population genetic connectivity of the brown alga Sargassum thunbergii in the north‐west Pacific

Phylogeographic Patterns Indicate Transatlantic Migration From Europe to North America in the Red Seaweed Chondrus Crispus (Gigartinales, Rhodophyta)1

Investigations on Reproductive Affinities in Red Algae

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