Population Structure of Dicranum Elongatum in Northeastern Regions of Wapusk National Park, Manitoba, Canada

Cassie, David M.; Piercey‐Normore, Michele D.; Belland, René J.

doi:10.1639/0007-2745(2008)111[302:psodei]2.0.co;2

Cited by 5 publications

(2 citation statements)

References 37 publications

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“…The same holds true when the results of this study are compared with those for haploid systems, such as terrestrial mosses. Since they are also gametophyte systems, haploid systems might be more appropriate for comparison purposes [37][38][39]. At the same time, however, the habitat structure of the sexual populations, that is, small and isolated ponds, could be responsible for the lower, and yet variable, genetic diversity observed in these populations [40].…”

Section: Genetic Diversity Of the Reproduction Modesmentioning

confidence: 99%

Genetic Structure of Sympatric Sexually and Parthenogenetically Reproducing Population ofChara canescens(Charophyta)

2011

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Individuals that reproduce parthenogenetically do not have to produce males and can therefore produce twice as many female offspring. With this twofold reproduction advantage of asexual reproduction, the question of how sex persists in the short term remains unresolved. In the dioecious charophyte Chara canescens, both parthenogenetically reproducing females and sexually reproducing females and males occur sympatrically at only one site in Europe: Neusiedler See-Seewinkel (Austria). By means of four nuclear species-specific microsatellite loci, we examined the interaction between coexisting sexuals and parthenogens by analysing the population structure and gene flow between both reproduction systems. Using a Bayesian assignment method, we found that the sites encompassed two genetically distinct clusters of individuals. The first cluster included genotypes of sexual individuals, which are genetically distinct from a second cluster which included parthenogenetic individuals and few sexually reproducing males, which are genetically identical to the parthenogenetic individuals. However, an analysis of the population genetic structure found no differences with respect to genotypic variation, clonal diversity, and population differentiation between the sympatric parthenogenetically and the sexually reproducing populations. The results indicated that the parthenogenetic individuals cannot outcompete the sexually reproducing individuals.

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Section: Genetic Diversity Of the Reproduction Modesmentioning

confidence: 99%

Genetic Structure of Sympatric Sexually and Parthenogenetically Reproducing Population ofChara canescens(Charophyta)

2011

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“…Morphologically circumscribed bryophyte species tend to have broader geographical distributions than angiosperm species ( Shaw 2001 ; Vanderpoorten et al 2010 ), and within an Australasian context Radula buccinifera does not appear to be an exception. This may be a real pattern attributable to spore-based reproduction and the relative ease with which spores are transported and new populations established ( Muñoz et al 2004 ; Pohjamo et al 2006 , Cassie et al 2008 ; Hutsemékers et al 2008 ), or an artefact of failing to detect cryptic or semi-cryptic species ( Heinrichs et al 2009b ; Medina et al 2012 ). In the Australasian region 290 species and 200 genera of seed plants (c. 9% of New Zealand’s flora) are indigenous to both Australia and New Zealand ( Wilton and Breitwieser 2000 ; McGlone et al 2001 ; de Lange et al 2007 ), 90 of New Zealand’s c. 200 fern species are shared with Australia ( Brownsey 2001 ), and 125 of 500 moss and 284 of New Zealand’s 595 liverwort species also occur in Australia ( Engel and Glenny 2008a ; Perrie et al 2010 ) suggesting widespread exchange of all floristic components via long-distance dispersal (LDD).…”

Section: Introductionmentioning

confidence: 99%

Integrative taxonomy resolves the cryptic and pseudo-cryptic Radula buccinifera complex (Porellales, Jungermanniopsida), including two reinstated and five new species

Renner¹,

Devos²,

Patiño³

et al. 2013

PHYTOKEYS

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Molecular data from three chloroplast markers resolve individuals attributable to Radula buccinifera in six lineages belonging to two subgenera, indicating the species is polyphyletic as currently circumscribed. All lineages are morphologically diagnosable, but one pair exhibits such morphological overlap that they can be considered cryptic. Molecular and morphological data justify the re-instatement of a broadly circumscribed ecologically variable R. strangulata, of R. mittenii, and the description of five new species. Two species Radula mittenii Steph. and R. notabilis sp. nov. are endemic to the Wet Tropics Bioregion of north-east Queensland, suggesting high diversity and high endemism might characterise the bryoflora of this relatively isolated wet-tropical region. Radula demissa sp. nov. is endemic to southern temperate Australasia, and like R. strangulata occurs on both sides of the Tasman Sea. Radula imposita sp. nov. is a twig and leaf epiphyte found in association with waterways in New South Wales and Queensland. Another species, R. pugioniformis sp. nov., has been confused with Radula buccinifera but was not included in the molecular phylogeny. Morphological data suggest it may belong to subg. Odontoradula. Radula buccinifera is endemic to Australia including Western Australia and Tasmania, and to date is known from south of the Clarence River on the north coast of New South Wales. Nested within R. buccinifera is a morphologically distinct plant from Norfolk Island described as R. anisotoma sp. nov. Radula australiana is resolved as monophyletic, sister to a species occurring in east coast Australian rainforests, and nesting among the R. buccinifera lineages with strong support. The molecular phylogeny suggests several long-distance dispersal events may have occurred. These include two east-west dispersal events from New Zealand to Tasmania and south-east Australia in R. strangulata, one east-west dispersal event from Tasmania to Western Australia in R. buccinifera, and at least one west-east dispersal from Australia to New Zealand in R. australiana. Another west-east dispersal event from Australia to Norfolk Island may have led to the budding speciation of R. anisotoma. In contrast, Radula demissa is phylogeographically subdivided into strongly supported clades either side of the Tasman Sea, suggesting long distance dispersal is infrequent in this species.

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Cyanobacterial mats and their application in sustainable agriculture

Jalaluddin,

Pandey

2024

Sustainable Agricultural Practices

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Population Structure of Dicranum Elongatum in Northeastern Regions of Wapusk National Park, Manitoba, Canada

Cited by 5 publications

References 37 publications

Genetic Structure of Sympatric Sexually and Parthenogenetically Reproducing Population ofChara canescens(Charophyta)

Genetic Structure of Sympatric Sexually and Parthenogenetically Reproducing Population ofChara canescens(Charophyta)

Integrative taxonomy resolves the cryptic and pseudo-cryptic Radula buccinifera complex (Porellales, Jungermanniopsida), including two reinstated and five new species

Cyanobacterial mats and their application in sustainable agriculture

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