Metteniusaceae, an early‐diverging family in the lamiid clade

González, Favio; Betancur, Julio; Maurin, Olivier; Freudenstein, John V.; Chase, Mark W.

doi:10.2307/25065861

Cited by 32 publications

(34 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Drosera, Rivadavia et al 2003). Consistent with the west wind drift, longdistance dispersal appears to be more common from Australia to New Zealand Wagstaff and Wege 2002;Ford et al 2007), although there have been a few well supported cases of dispersals in the other direction (Wagstaff and GarnockJones 2000;Lockhart et al 2001;Wanntorp and Wanntorp 2003;Meudt and Bayly 2008).…”

Section: Introductionmentioning

confidence: 89%

“…Many phylogenetic studies have found that several Australian and New Zealand groups have closely related species or species complexes, suggesting recent or frequent dispersal or both (Breitwieser et al 1999;von Hagen and Kadereit 2001;Smissen et al 2003;Meudt and Simpson 2006;Ford et al 2007;. Groups with dispersible propagules might have repeatedly crossed the Tasman Sea (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Winkworth et al 1999;Stöckler et al 2002;Knapp et al 2005Knapp et al , 2007 suggests that the origins of New Zealand flora may be the result of a mixture of older vicariance and more recent long-distance dispersal events. For the latter, a common pattern observed is a single dispersal event followed by rapid radiation (Wagstaff and Garnock-Jones 1998;Winkworth et al 1999;Perrie et al 2003;Albach et al 2005;Meudt and Simpson 2006;Ford et al 2007). Despite increasing numbers of molecular studies involving New Zealand plants, general evolutionary and biogeographic patterns of the New Zealand flora are still not well known, particularly those regarding species in the alpine region (Lockhart et al 2001).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

DNA sequences from three genomes reveal multiple long-distance dispersals and non-monophyly of sections in Australasian Plantago (Plantaginaceae)

Tay

Meudt

Garnock‐Jones

et al. 2010

Aust. Systematic Bot.

View full text Add to dashboard Cite

In our recent paper (Tay et al. 2010), several errors arose in Figs 5 and 6, mostly at the drafting stage: we neglected a polytomy in both figures; the tree topology in Fig. 6 was incorrect; the names of seven terminal taxa were associated with the wrong branches in Fig. 6; and P. euryphylla was spelled incorrectly in Fig. 5. The figures presented here correct these errors.Additionally, we have updated the data presented by including the diploid chromosome number of P. daltonii (Brown 1981).Fortunately, the discussion and conclusions of the original paper are still consistent with the revised figures. Abstract. We examined the geographic origins and taxonomic placements of New Zealand and Australian Plantago (Plantaginaceae) by using molecular phylogenetic data. Plantago comprises over 200 species distributed worldwide. Analyses of three markers from the nuclear (ITS), chloroplast (ndhF-rpl32) and mitochondrial (coxI) genomes showed that the New Zealand species form three distinct, well supported clades that are not each others' closest relatives, and were each derived relative to the sampled Australian species. Therefore, at least three long-distance directional dispersal events into New Zealand can be inferred for Plantago, likely from Australian ancestors. This result differs from the biogeographic pattern often reported for New Zealand plant genera of a single dispersal event followed by rapid radiation, and may be attributed to ready biotic dispersal of mucilaginous seeds and habitat similarities of the Australasian species. Molecular dating placed the arrival time and diversification of the New Zealand species between 2.291 and 0.5 million years ago, which coincides with the geological dates for the uplift of mountain ranges in New Zealand. The mitochondrial DNA substitution rate of the Australasian clade relative to the rest of the genus is discussed, as well as implications of the non-monophyly of sections Oliganthos, Mesembrynia and Plantago within subgenus Plantago.

show abstract

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DNA sequences from three genomes reveal multiple long-distance dispersals and non-monophyly of sections in Australasian Plantago (Plantaginaceae)

Tay

Meudt

Garnock‐Jones

et al. 2010

Aust. Systematic Bot.

View full text Add to dashboard Cite

show abstract

“…Indeed, P. radicatum occurs in the Tasmanian mountains and is considered to have dispersed there and diverged contemporaneously with the radiation of Pachycladon in New Zealand [21,22]. Other taxa are also shared between the two countries, but these are considered to have dispersed eastward from Australia to New Zealand and include, for example, Craspedia [66], Montigena [67], Poranthera [68], Scleranthus [69], and Stylidiaceae [70]. This pattern of eastward dispersal means it is plausible that Pachycladon could have originated in Australia and then subsequently dispersed to New Zealand.…”

Section: Discussionmentioning

confidence: 99%

Island species radiation and karyotypic stasis in Pachycladonallopolyploids

2010

View full text Add to dashboard Cite

BackgroundPachycladon (Brassicaceae, tribe Camelineae) is a monophyletic genus of ten morphologically and ecogeographically differentiated, and presumably allopolyploid species occurring in the South Island of New Zealand and in Tasmania. All Pachycladon species possess ten chromosome pairs (2n = 20). The feasibility of comparative chromosome painting (CCP) in crucifer species allows the origin and genome evolution in this genus to be elucidated. We focus on the origin and genome evolution of Pachycladon as well as on its genomic relationship to other crucifer species, particularly to the allopolyploid Australian Camelineae taxa. As species radiation on islands is usually characterized by chromosomal stasis, i.e. uniformity of chromosome numbers/ploidy levels, the role of major karyotypic reshuffling during the island adaptive and species radiation in Pachycladon is investigated through whole-genome CCP analysis.ResultsThe four analyzed Pachycladon species possess an identical karyotype structure. The consensual ancestral karyotype is most likely common to all Pachycladon species and corroborates the monophyletic origin of the genus evidenced by previous phylogenetic analyses. The ancestral Pachycladon karyotype (n = 10) originated through an allopolyploidization event between two genomes structurally resembling the Ancestral Crucifer Karyotype (ACK, n = 8). The primary allopolyploid (apparently with n = 16) has undergone genome reshuffling by descending dysploidy toward n = 10. Chromosome "fusions" were mediated by inversions, translocations and centromere inactivation/loss. Pachycladon chromosome 3 (PC3) resulted from insertional fusion, described in grasses. The allopolyploid ancestor originated in Australia, from the same or closely related ACK-like parental species as the Australian Camelineae allopolyploids. However, the two whole-genome duplication (WGD) events were independent, with the Pachycladon WGD being significantly younger. The long-distance dispersal of the diploidized Pachycladon ancestor to New Zealand was followed by the Pleistocene species radiation in alpine habitats and characterized by karyotypic stasis.ConclusionsKaryotypic stasis in Pachycladon suggests that the insular species radiation in this genus proceeded through homoploid divergence rather than through species-specific gross chromosomal repatterning. The ancestral Pachycladon genome originated in Australia through an allopolyploidization event involving two closely related parental genomes, and spread to New Zealand by a long-distance dispersal. We argue that the chromosome number decrease mediated by inter-genomic reshuffling (diploidization) could provide the Pachycladon allopolyploid founder with an adaptive advantage to colonize montane/alpine habitats. The ancestral Pachycladon karyotype remained stable during the Pleistocene adaptive radiation into ten different species.

show abstract

“…Wagstaff & Garnock-Jones 1998;Lockhart et al 2001;Smissen et al 2003;Meudt & Simpson 2007) and to help bring more precision to the systematics of many New Zealand plant groups (e.g. Heenan et al 2002;Glenny 2004;Smissen et al 2004;Perrie & Brownsey 2005;Ford et alPlantago (Plantaginaceae) is a large genus of wind-pollinated plants, with over 200 species distributed worldwide. Eight species native to New Zealand were recognized in the most recent taxonomic treatment (Sykes 1988a) ( Table 1).…”

Section: Introductionmentioning

confidence: 99%

Testing species limits of New ZealandPlantago(Plantaginaceae) using internal transcribed spacer (ITS) DNA sequences

Tay

Meudt

Garnock‐Jones

et al. 2010

New Zealand Journal of Botany

View full text Add to dashboard Cite

Geological and climatic changes, coupled with long-distance dispersals, have resulted in relatively recent origins and radiations of many New Zealand plant lineages. Several have extensive morphological but low genetic variation, rendering taxonomic resolution difficult. This study presents population-level phylogenies and networks for the New Zealand species of Plantago (Plantaginaceae) using DNA sequences from internal transcribed spacer (ITS) regions of the nuclear ribosomal genes. The data suggest that the two P. spathulata subspecies, and a 16-ploid entity (P. sp. 'Sylvester'), should be recognized at species rank. However, there was no evidence for divergence of: two P. raoulii forms; P. lanigera and P. novae-zelandiae; and two P. triandra subspecies. Several species and subspecies boundaries require revision with additional data (e.g. chromosome counts, morphological data, and additional DNA loci) needed. The high morphological variation but low sequence divergence found here could be caused by various factors, including incomplete speciation and/or hybridization.

show abstract

Metteniusaceae, an early‐diverging family in the lamiid clade

Cited by 32 publications

References 29 publications

DNA sequences from three genomes reveal multiple long-distance dispersals and non-monophyly of sections in Australasian Plantago (Plantaginaceae)

DNA sequences from three genomes reveal multiple long-distance dispersals and non-monophyly of sections in Australasian Plantago (Plantaginaceae)

Island species radiation and karyotypic stasis in Pachycladonallopolyploids

Testing species limits of New ZealandPlantago(Plantaginaceae) using internal transcribed spacer (ITS) DNA sequences

Contact Info

Product

Resources

About