The chloroplast generps 4 as a tool for the study ofPoaceae phylogeny

Nadot, Sophie; Bajon, Robert; Lejeune, Bernard

doi:10.1007/bf00985340

Cited by 142 publications

(75 citation statements)

References 30 publications

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“…Four chloroplast regions, including rpoC1 (Chase et al, 2007), rps4 (Nadot et al, 1994;Souza-Chies et al, 1997), trnG (Pacak and Szweykowska-Kulinska, 2000), and trnL-trnF (Taberlet et al, 1991) were selected for exhibiting the appropriate level of polymorphism at the species level in Bryoxiphium. These loci were amplified and sequenced following the protocols of Patiño et al (2015a).…”

Section: Taxon and Molecular Samplingmentioning

confidence: 99%

Is the sword moss (Bryoxiphium) a preglacial Tertiary relict?

Patiño

Goffinet

Sim‐Sim

et al. 2016

Molecular Phylogenetics and Evolution

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a b s t r a c tThe disjunction of floras between East Asia, Southeast North America, West North America, and Southwest Eurasia has been interpreted in terms of the fragmentation of a once continuous mixed mesophytic forest that occurred throughout the Northern Hemisphere due to the climatic and geological changes during the late Tertiary. The sword moss, Bryoxiphium, exhibits a distribution that strikingly resembles that of the mesophytic forest elements such as Liriodendron and is considered as the only living member of an early Tertiary flora in Iceland. These hypotheses are tested here using molecular dating analyses and ancestral area estimations. The results suggest that the extant range of Bryoxiphium results from the fragmentation of a formerly wider range encompassing North America and Southeast Asia about 10 million years ago. The split of continental ancestral populations is too recent to match with a continental drift scenario but is spatially and temporally remarkably congruent with that observed in Tertiary angiosperm relict species. The timing of the colonization of Iceland from Macaronesian ancestors, about two million years ago, is, however, incompatible with the hypothesis that Bryoxiphium is the only living member of an early Tertiary flora of the island. Alaska was recurrently colonized from East Asia. The ability of Bryoxiphium to overcome large oceanic barriers is further evidenced by its occurrence on remote oceanic archipelagos. In particular, Madeira was colonized twice independently from American and East Asian ancestors, respectively. The striking range disjunction of Bryoxiphium is interpreted in terms of its mating system, as the taxon exhibits a very singular pattern of spatial segregation of the sexes.

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Section: Taxon and Molecular Samplingmentioning

confidence: 99%

Is the sword moss (Bryoxiphium) a preglacial Tertiary relict?

Patiño

Goffinet

Sim‐Sim

et al. 2016

Molecular Phylogenetics and Evolution

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“…Double-stranded DNA templates were prepared using polymerase chain reaction (PCR) conditions described in . The trnL region, rps4 gene, and atpB-rbcL spacer were amplified using the primers trnC and trnF (Taberlet et al 1991), rps5 (Nadot et al 1994) and trnas (Cox et al 2000), and atpB1 and rbcL1 (Chiang et al 1998), respectively. Fragments of approximately 450 nucleotides (nt) from the trnL region, 650 nt from the rps4 gene, and 680 nt from the atpB-rbcL spacer were amplified.…”

Section: Molecular Methodsmentioning

confidence: 99%

Phylogeographic Structure and Cryptic Speciation in the Trans-Antarctic Moss Pyrrhobryum Mnioides

2003

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Abstract. Many bryophyte species have distributions that span multiple continents. The hypotheses historically advanced to explain such distributions rely on either long-distance spore dispersal or slow rates of morphological evolution following ancient continental vicariance events. We use phylogenetic analyses of DNA sequence variation at three chloroplast loci (atpB-rbcL spacer, rps4 gene, and trnL intron and 3Ј spacer) to examine these two hypotheses in the trans-Antarctic moss Pyrrhobryum mnioides. We find: (1) reciprocal monophyly of Australasian and South American populations, indicating a lack of intercontinental dispersal; (2) shared haplotypes between Australia and New Zealand, suggesting recent or ongoing migration across the Tasman Sea; and (3) reciprocal monophyly among Patagonian and neotropical populations, suggesting no recent migration along the Andes. These results corroborate experimental work suggesting that spore features may be critical determinants of species range. We use the mid-Miocene development of the Atacama Desert, 14 million years ago, to calibrate a molecular clock for the tree. The age of the trans-Antarctic disjunction is estimated to be 80 million years ago, consistent with Gondwanan vicariance, making it among the most ancient documented cases of cryptic speciation. These data are in accord with niche conservatism, but whether the morphological stasis is a product of stabilizing selection or phylogenetic constraint is unknown.

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“…Within Poaceae a single origin of the temperate grasses (Pooideae) is possible (GPWG 2001); however, the taxonomic limits of recently evolved pooid tribes become blurred when many taxa are sampled and analyzed (Soreng and Davis 2000). Phylogenetic analyses based on chloroplast and nuclear DNA sequences have supported the sister relationship of tribes Poeae and Aveneae within the core group of most recently evolved Pooideae (Soreng et al 1990;Nadot et al 1994;Hsiao et al 1995;Catalán et al 1997). However, Soreng and Davis' (2000) study, with the greatest sampling of Poeae-Aveneae taxa, based on combined analysis of chloroplast RFLP data and structural characters, showed intermingling of representatives of the two tribes in the optimal tree.…”

Section: Introductionmentioning

confidence: 99%

A Systematic Approach to Subtribe Loliinae (Poaceae: Pooideae) Based on Phylogenetic Evidence

Catalán¹,

Torrecilla²,

López-Rodríguez³

et al. 2007

aliso

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Loliinae (Poaceae, Pooideae) encompass a large group of genera closely related to Festuca, the largest genus in the subtribe, which as traditionally circumscribed has been shown to be highly paraphyletic. In this investigation we combined molecular and morphological data representing 20 genera of Loliinae and closely related subtribes. Combined analysis of nucleotide sequences from the nuclear ITS and chloroplast trnL-F regions and structural characters recovered a consensus topology that shows Loliinae to be monophyletic and possessing two main clades-the fine-leaved Festuca clade that includes Ctenopsis, Micropyrum, Narduroides, Psilurus, Vulpia, and Wangenheimia, and the broad-leaved Festuca clade that includes Lolium and Micropyropsis. The presence of morphologically intermediate, unresolved, or poorly supported taxa (Castellia, Festuca subgen. Subulatae and subgen. Leucopoa p. p., and Festuca sect. Amphigenes p. p.) among the two groups points to a potential evolutionary trend from ancestral broad-leaved taxa to the more recently evolved fine-leaved taxa. Alternate classifications are evaluated for subtribes Loliinae, Cynosurinae, Dactylidinae, and Parapholiinae. We propose to maintain a paraphyletic Festuca as presently circumscribed and not to divide the polyphyletic Vulpia and Festuca infrageneric taxa until more phylogenetic data become available.

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The chloroplast generps 4 as a tool for the study ofPoaceae phylogeny

Cited by 142 publications

References 30 publications

Is the sword moss (Bryoxiphium) a preglacial Tertiary relict?

Is the sword moss (Bryoxiphium) a preglacial Tertiary relict?

Phylogeographic Structure and Cryptic Speciation in the Trans-Antarctic Moss Pyrrhobryum Mnioides

A Systematic Approach to Subtribe Loliinae (Poaceae: Pooideae) Based on Phylogenetic Evidence

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