Morphological and amplified fragment length polymorphism (AFLP) data show that New Zealand endemic Myosotis petiolata (Boraginaceae) comprises three rare and threatened species

Meudt, Heidi M.; Prebble, Jessica M.; Stanley, R. J.; Thorsen, Michael J.

doi:10.1071/sb13023

Cited by 16 publications

(14 citation statements)

References 60 publications

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“…Such radiations appear to have created polytomies (at least with the genetic markers used here) as a consequence of the genetic divergence that leads to rapid speciation involving the filling of available niches through competition with other co‐occurring species (Naciri & Linder, 2020). Other lineages of plants have also colonized the SW Pacific apparently involving in‐situ radiations ( Ranunculus , Lehnebach, 2008; Myosotis , Meudt et al, 2013), including certain Carex groups (i.e., sect. Uncinia and sect.…”

Section: Discussionmentioning

confidence: 99%

Geographical vs. ecological diversification inCarexsectionPhacocystis(Cyperaceae): Patterns hidden behind a twisted taxonomy

Benítez‐Benítez

Martín‐Bravo

Bjorå

et al. 2021

J of Sytematics Evolution

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Carex section Phacocystis (Cyperaceae) is one of the most diverse and taxonomically complex groups of sedges (between 116 and 147 species), with a worldwide distribution in a wide array of biomes. It has a very complicated taxonomic history, with numerous disagreements among different treatments. We studied the biogeography and niche evolution in a phylogenetic framework to unveil the relative contribution of geographical and ecological drivers to diversification of the group. We used a large species sampling of the section (82% of extant species) to build a phylogeny based on four DNA regions, constrained with a phylogenomic HybSeq tree and dated with six fossil calibrations. Our phylogenetic results recovered section Phacocystis s.s. (core Phacocystis) as sister to section Praelongae. Ancestral area reconstruction points toward the N Pacific as the cradle for the crown diversification of section Phacocystis during the Middle Miocene. Wide distributions were recurrently inferred across deep nodes. Large Northern Hemisphere lineages with geographical congruence were retrieved, pointing toward the importance of allopatric divergence at deep phylogenetic levels, whereas withinarea speciation emerges as the predominant pattern at shallow phylogenetic level. The Southern Hemisphere (Neotropics, SW Pacific) was colonized several times from the Northern Hemisphere. The global expansion of Carex section Phacocystis did not entail major ecological changes along the inner branches of the phylogeny. Nevertheless, ecological differentiation seems to gain importance toward recent times.

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Section: Discussionmentioning

confidence: 99%

Geographical vs. ecological diversification inCarexsectionPhacocystis(Cyperaceae): Patterns hidden behind a twisted taxonomy

Benítez‐Benítez

Martín‐Bravo

Bjorå

et al. 2021

J of Sytematics Evolution

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“…A priority in the conservation management of members of this genus is to both accurately delimit species and understand the levels and structure of genetic diversity present. Low genetic diversity in New Zealand Myosotis , as evidenced by previous studies ( Meudt et al, 2013( Meudt et al, , 2015, suggests that additional molecular markers are needed.…”

Section: Ap Applicati Tions Ons In In Pl Plant T Scien Sciences Cesmentioning

confidence: 90%

Microsatellite markers for the New Zealand endemic Myosotis pygmaea species group (Boraginaceae) amplify across species

et al. 2015

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Premise of the study:Microsatellite loci were developed as polymorphic markers for the New Zealand endemic Myosotis pygmaea species group (Boraginaceae) for use in species delimitation and population and conservation genetic studies.Methods and Results:Illumina MiSeq sequencing was performed on genomic DNA from seedlings of M. drucei. From trimmed paired-end sequences >400 bp, 484 microsatellite loci were identified. Twelve of 48 microsatellite loci tested were found to be polymorphic and consistently scorable when screened on 53 individuals from four populations representing the geographic range of M. drucei. They also amplify in all other species in the M. pygmaea species group, i.e., M. antarctica, M. brevis, M. glauca, and M. pygmaea, as well as 18 other Myosotis species.Conclusions:These 12 polymorphic microsatellite markers establish an important resource for research and conservation of the M. pygmaea species group and potentially other Southern Hemisphere Myosotis.

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“…Analysis of single-source datasets may yield results that are (at best) uninformative or (at worst) misleading regarding the evolutionary history and potential trajectory of lineages. Evaluating multiple criteria (e.g., morphological and molecular data) should increase our ability to detect recently separated lineages and can provide stronger support for lineage distinction, and thus justification for species delimitation, when they agree (e.g., Ornelas-García & al., 2008;Reeves & Richards, 2011;Meudt & al., 2013).…”

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confidence: 99%

“…One of these (Myosotis (d) WELT SP089763/A; "Rock and Pillar") was published in 2018 as Myosotis umbrosa, so appears on both the accepted and putative taxa lists, making the total number of putative minimum rank Myosotis taxa in New Zealand 52. The combination of several putative taxa and a high proportion of threatened taxa make the taxonomic revision of the genus a top priority (de Lange & al., 2013(de Lange & al., , 2018 and work is ongoing to that end (Lehnebach, 2012a,b;Meudt & al., 2013.…”

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confidence: 99%

“…A combination of small population size (common in the M. pygmaea group; see Table 2) and self-compatibility can be especially severe in reducing genetic variation (Lande, 1995;Cole, 2003) and must be taken into account when interpreting population genetic results. To assess their tendency to self-fertilise, a comparison of the population genetic variation found in the M. pygmaea species group with that of the M. petiolata complex was undertaken, as species in the M. petiolata complex are predominantly outcrossing based on their exserted anthers and population genetic structure (Meudt & al., 2013).…”

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confidence: 99%

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Comparing and co‐analysing microsatellite and morphological data for species delimitation in the New Zealand native Myosotis pygmaea species group (Boraginaceae)

Prebble

Meudt

Tate

et al. 2019

TAXON

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Delimiting species boundaries in recent plant radiations can be challenging. The New Zealand native Myosotis pygmaea (Boraginaceae) species group is a case in point. This species complex is of interest as it includes threatened species as well as possibly threatened unnamed putative taxa. Integrative taxonomic approaches using multiple lines of evidence are frequently used to overcome the difficulties of identifying lineages resulting from recent radiations. Here we analyse genotypic data from nearly 500 Myosotis individuals using microsatellite markers, and compare and co-analyse this dataset with previously published morphological data. Within the M. pygmaea group, several genetic clusters can be identified, none of which align exactly with the current taxonomy and morphological variation previously identified. When co-analysing the molecular and morphological data, M. brevis can be distinguished from the remainder of the M. pygmaea species group, but no other species or previously recognised morphological groups are supported. Other groupings within the molecular dataset appear to reflect geographic structure. Within the M. pygmaea species group, the resulting pattern of low within, and high between, population genetic variation is consistent with self-fertilization and low levels of seed dispersal.

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Morphological and amplified fragment length polymorphism (AFLP) data show that New Zealand endemic Myosotis petiolata (Boraginaceae) comprises three rare and threatened species

Cited by 16 publications

References 60 publications

Geographical vs. ecological diversification inCarexsectionPhacocystis(Cyperaceae): Patterns hidden behind a twisted taxonomy

Geographical vs. ecological diversification inCarexsectionPhacocystis(Cyperaceae): Patterns hidden behind a twisted taxonomy

Microsatellite markers for the New Zealand endemic Myosotis pygmaea species group (Boraginaceae) amplify across species

Comparing and co‐analysing microsatellite and morphological data for species delimitation in the New Zealand native Myosotis pygmaea species group (Boraginaceae)

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