Phylogenetic Relationships within Phacelia subgenus Phacelia (Hydrophyllaceae) Inferred From Nuclear rDNA ITS Sequence Data

@inproceedings{Gilbert2005PhylogeneticRW,
  title={Phylogenetic Relationships within Phacelia subgenus Phacelia (Hydrophyllaceae) Inferred From Nuclear rDNA ITS Sequence Data},
  author={Cynthia Gilbert and John Dempcy and Constance Ganong and Robert W. Patterson and Greg Spicer},
  year={2005}
}
Abstract We examined infrageneric relationships within Phacelia subgenus Phacelia based on phylogenetic hypotheses derived from internal transcribed spacers (ITS) and the 5.8S gene of nuclear ribosomal DNA. Maximum parsimony (MP) and maximum likelihood (ML) phylogenies support the monophyly of sects. Euglypta and Miltitzia, previously hypothesized based on seed characters and ecological distribution. Tree branching patterns within the Euglypta/Miltitzia clade indicate three principle lineages… 
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Phylogenies and Chromosome Evolution of Phacelia (Boraginaceae: Hydrophylloideae) Inferred from Nuclear Ribosomal and Chloroplast Sequence Data
TLDR
Phylogenetic analyses (maximum parsimony, maximum likelihood, and Bayesian inference) recovered gene tree topologies similar to previous molecular studies and corroborate incongruence between nuclear and plastid topologies for placement of some problematic groups.
Phylogenetic Relationships between and within Phacelia Sections Whitlavia and Gymnobythus (Boraginaceae)
TLDR
The results indicate that section Gymnobythus is monophyletic, and members of section Whitlavia form two clades that correspond to subsections previously suggested by Gillett.
Phylogeny and historical biogeography of Hydrophyllaceae and Namaceae, with a special reference to Phacelia and Wigandia
TLDR
The phylogeny of Hydrophyllaceae and Namaceae is inferred implementing both likelihood and Bayesian methods and long-distance dispersal may have been necessary for the colonization of South America by Namaceae during the Oligocene–Miocene transition, when North and South America were not connected.
Correspondence of morphology, phylogeny and reproductive barriers in Phacelia subgenus cosmanthus (Hydrophyllaceae)1
TLDR
Gene flow between members of this closely related species pair is blocked by hybrid inviability whose expression occurs following normal pollen tube growth and apparent fertilization, which adds to the knowledge of an already diverse suite of isolating mechanisms in Phacelia subgenus Cosmanthus.
Evidence of Ecological Speciation in Phacelia .
TLDR
DNA sequences from the ribosomal DNA internal transcribed region showed that Phacelia fimbriata and P. purshii comprise a monophyletic clade but that P. fimbRIata is more differentiated from related species.
Karyotype Analysis of the Fiddleneck （Phacelia tanacetifofia Benth.）
TLDR
Two varieties of fiddleneck (Phacelia tanacetifolia Benth.) plant were determined for visualizing somatic chromosomes and the karyotype formulas of two varieties offiddleneck were 16 median and 6 submedian (16 m + 6 sm).
Elevation of Phacelia cicutaria var. hubbyi (Boraginaceae) to Species Status
TLDR
It is distinguished morphologically from P. cicutaria and P. hispida by its more robust habit, more densely congested inflorescences, lack of mottled markings on the corolla, thicker shaggy hairs on the stems and leaves, and calyx lobes that closely invest the fruit.
Are polyploids really evolutionary dead-ends (again)? A critical reappraisal of Mayrose et al. ().
TLDR
Polyploidy is now viewed not as a mere side branch of evolution, but as a major mechanism of evolution and diversification.
Recently Formed Polyploid Plants Diversify at Lower Rates
TLDR
Likelihood-based analyses indicate that polyploids generally exhibit lower speciation rates and higher extinction rates than diploids, providing the first quantitative corroboration of the dead-end hypothesis.
Range size, taxon age and hotspots of neoendemism in the California flora
TLDR
Substantial portions of California with high levels of plant neoendemism fall outside of protected lands, indicating that additional action will be needed to preserve the geographic areas apparently associated with high rates of plant diversification.
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