A Genetic Analysis of Two Recently Described Peat Moss Species, <i>Sphagnum atlanticum</i> and <i>S. bergianum</i> (Sphagnaceae)

Shaw, Blanka; Terracciano, Stefano; Shaw, A. Jonathan

doi:10.1600/036364409787602212

Cited by 17 publications

(11 citation statements)

References 13 publications

(18 reference statements)

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“…Based upon microsatellites, in many cases the same ones used in this study, the regional genetic diversity detected in New Zealand and northwestern North America S. subnitens is the lowest reported for Sphagnum (Karlin et al. 2008a,b, 2009, 2010; Shaw et al. 2008a,b, 2009; Szövényi et al.…”

Section: Discussionmentioning

confidence: 82%

“…The following herbaria were used: New York Botanical Garden (NY), University British Columbia (UBC), State University of New York, Binghamton (BING), Duke University (DUKE), Missouri Botanical Garden (MO), Auckland War Memorial Museum (AK), Landcare Research New Zealand Limited (CHR) and the Norwegian University of Science and Technology (TRH). Microsatellite data for nine of the herbarium specimens were incorporated from Shaw et al. (2009).…”

Section: Methodsmentioning

confidence: 99%

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One haploid parent contributes 100% of the gene pool for a widespread species in northwest North America

et al. 2010

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The monoicous peatmoss Sphagnum subnitens has a tripartite distribution that includes disjunct population systems in Europe (including the Azores), northwestern North America and New Zealand. Regional genetic diversity was highest in European S. subnitens but in northwestern North America, a single microsatellite-based multilocus haploid genotype was detected across 16 sites ranging from Coos County, Oregon, to Kavalga Island in the Western Aleutians (a distance of some 4115 km). Two multilocus haploid genotypes were detected across 14 sites on South Island, New Zealand. The microsatellite-based regional genetic diversity detected in New Zealand and North American S. subnitens is the lowest reported for any Sphagnum. The low genetic diversity detected in both of these regions most likely resulted from a founder event associated with vegetative propagation and complete selfing, with one founding haploid plant in northwest North America and two in New Zealand. Thus, one plant appears to have contributed 100% of the gene pool for the population systems of S. subnitens occurring in northwest North America, and this is arguably the most genetically uniform group of plants having a widespread distribution yet detected. Although having a distribution spanning 12.5° of latitude and 56° of longitude, there was no evidence of any genetic diversification in S. subnitens in northwest North America. No genetic structure was detected among the three regions, and it appears that European plants of S. subnitens provided the source for New Zealand and northwest North American populations.

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Section: Discussionmentioning

confidence: 82%

Section: Methodsmentioning

confidence: 99%

One haploid parent contributes 100% of the gene pool for a widespread species in northwest North America

et al. 2010

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“…Some studies of genetic variation in widespread species have failed to detect population structure (e.g., Cronberg et al, 1997 ;Akiyama, 1994 ;Shaw et al, 2009 ) and imply near-panmixis at the landscape and regional scales. Anthropogenic substrates are often colonized by species not present in the local environment ( Abts and Heinrichs, 1997 ;Soro et al, 1999;Miller and McDaniel, 2005 ), demonstrating effective dispersal and establishment over regional scales.…”

Section: Discussionmentioning

confidence: 99%

Morphologically cryptic biological species within the liverwort Frullania asagrayana

Ramaiya

Johnson

Shaw

et al. 2010

American J of Botany

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The genetic structure of F. asagrayana in eastern North America reflects morphologically cryptic differentiation between reproductively isolated groups of populations, near-panmixis within groups, and clonal propagation at local scales. Reproductive isolation between groups that are invariant at the level of nucleotide sequences shows that caution must be exercised in making taxonomic and evolutionary inferences from reciprocal monophyly (or lack thereof) between putative species.

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“…, 2004a). Shaw et al. (2009) similarly found a weak, but significant, correlation between genetic and geographical differences between plants of Sphagnum torreyanum .…”

Section: Introductionmentioning

confidence: 88%

Macroecological patterns of genetic structure and diversity in the aquatic mossPlatyhypnidium riparioides

et al. 2009

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Summary Genetic diversity and structure are described in the aquatic moss Platyhypnidium riparioides to assess its dispersal ability at a regional scale and to determine whether patterns of genetic differentiation correlate with environmental variation. Variation at six nuclear microsatellite loci from 50 populations in southern Belgium was investigated through Mantel tests, partial Mantel tests and spatial analysis of molecular variance. Overall patterns of genotypic variation showed strong differentiation among populations at a regional scale (FST = 0.57). The high values of FIS observed within populations at both the ramet and genet levels, and the higher proportion of ramets with the same genotype than expected by chance, all point to a strongly clonal or selfing mating system. A genetic discontinuity was identified between northern and southern groups of populations. Within each group, FST and geographical distances were significantly correlated. Partial Mantel tests suggest that genetic and ecological distances are significantly correlated in the southern group. The results point to strong dispersal limitation at the landscape scale and suggest that the southern and northern groups experienced different histories. Within the former, the correlation between genetic and ecological variation is suggestive of reproductive isolation among ecotypes.

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A Genetic Analysis of Two Recently Described Peat Moss Species, Sphagnum atlanticum and S. bergianum (Sphagnaceae)

Cited by 17 publications

References 13 publications

One haploid parent contributes 100% of the gene pool for a widespread species in northwest North America

One haploid parent contributes 100% of the gene pool for a widespread species in northwest North America

Morphologically cryptic biological species within the liverwort Frullania asagrayana

Macroecological patterns of genetic structure and diversity in the aquatic mossPlatyhypnidium riparioides

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