Phylogenetic relationships and morphological patterns in Graptopetalum (Crassulaceae)

Acevedo-Rosas, Raúl; Sosa, Victoria; Lorea, Francisco

doi:10.1663/0007-196x(2004)056[0185:prampi]2.0.co;2

Cited by 8 publications

(10 citation statements)

References 6 publications

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“…Morphological analyses (Acevedo-Rosas and Cházaro, 2003;Acevedo-Rosas et al, 2004) also recover this monophyletic group, which is characterized by flowers with only one whorl of stamens. Within these clades, only four smaller subgroups of Graptopetalum species receive bootstrap support (Ͼ50%), but these largely correlate with the geographic distribution of the species.…”

Section: Discussionmentioning

confidence: 83%

“…Graptopetalum glassii, G. superbum, and G. pentandrum form a well-supported clade that is also present in all most parsimonious trees obtained with ETS and ITS data sets alone. Morphological analyses (Acevedo-Rosas and Cházaro, 2003;Acevedo-Rosas et al, 2004) also recover this monophyletic group, which is characterized by flowers with only one whorl of stamens. These three species are confined to the states of Colima, Jalisco, and Michoacán in west-central Mexico.…”

Section: Discussionmentioning

confidence: 83%

“…Species placed in section Byrnesia (caulescent species) as well as those classified in section Graptopetalum (acaulescent species) are distributed throughout the cladogram. Most Graptopetalum species are found in semiarid vegetation, and populations are usually isolated on rocky hills of ravines in these habitats (Acevedo-Rosas et al, 2004). If we are to accept these gene tree topologies, then the separate lineages of Graptopetalum species cannot be characterized by those morphological characters that Acevedo-Rosas et al (2004) found to be synapomorphic.…”

Section: Discussionmentioning

confidence: 99%

“…For example, the acaulescent species G. marginatum is sister to G. fruticosum, one of the caulescent species. If we are to accept these gene tree topologies, then the separate lineages of Graptopetalum species cannot be characterized by those morphological characters that Acevedo-Rosas et al (2004) found to be synapomorphic. Among these characters are habit, flower fragrance, color of petals, and position of petal maculae.…”

Section: Discussionmentioning

confidence: 99%

“…A recent phylogenetic analysis of Graptopetalum using morphological characters (Acevedo-Rosas et al, 2004) does not support the monophyly of the genus unless certain species of Sedum are transferred into Graptopetalum. Among a number of clades, two well-supported groups were recovered, one including the acaulescent species and another containing all the haplostemonous taxa.…”

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confidence: 95%

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A molecular phylogenetic study of Graptopetalum (Crassulaceae) based on ETS, ITS, RPL16, and TRNL‐F nucleotide sequences

Acevedo-Rosas

Cameron

Sosa

et al. 2004

American J of Botany

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Nuclear ETS and ITS, as well as plastid rpl16 and trnL-F DNA sequences were used to determine relationships among species of Graptopetalum (Crassulaceae) and closely related genera. Graptopetalum is member of a group of taxa restricted to North America, one of the centers of diversity of Crassulaceae; however, their phylogenetic relationships are not yet understood. Nineteen species of Graptopetalum and 24 species from nine other genera of Crassulaceae were sampled for use in three separate parsimony analyses: ITS alone, ETS alone, and a combined nuclear + plastid DNA analysis using all four gene regions. The ETS data set had the highest number of parsimony-informative sites, about 30% more than in ITS, but the most fully resolved tree resulted when the four DNA regions were combined. Only four subclades of the tree received moderate to strong bootstrap support, one of which includes all species of Graptopetalum having a single whorl of stamens. However, Graptopetalum is not monophyletic. Instead, Tacitus bellus and select species of Cremnophila, Sedum, and Echeveria are interspersed among species of Graptopetalum and show evidence of grouping according to geographical range of distribution more so than habit or floral morphology.

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 95%

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A molecular phylogenetic study of Graptopetalum (Crassulaceae) based on ETS, ITS, RPL16, and TRNL‐F nucleotide sequences

Acevedo-Rosas

Cameron

Sosa

et al. 2004

American J of Botany

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Linnaeus's folly – phylogeny, evolution and classification of Sedum (Crassulaceae) and Crassulaceae subfamily Sempervivoideae

Messerschmid

Klein²,

Kadereit

et al. 2020

TAXON

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Sedum, containing approximately 470 species, is by far the largest genus of Crassulaceae. Three decades of molecular phylogenetic work have provided evidence for the non‐monophyly of Sedum and many more of the 30 genera of Crassulaceae subfam. Sempervivoideae. In this study, we present a broadly sampled and dated molecular phylogeny of Sempervivoideae including 80% of all infrageneric taxa described in Sedum as well as most other genera of the subfamily. We used sequences of one nuclear (ITS) and three plastid markers (matK, rps16, trnL‐trnF). The five major lineages of Sempervivoideae (i.e., Telephium clade, Petrosedum clade, Sempervivum/Jovibarba, Aeonium clade, Leucosedum plus Acre clades) were resolved as successive sister to each other in the phylogenetic analysis of the plastid markers, while in the ITS phylogeny the Petrosedum clade is the closest relative of the Aeonium clade. Our dating analysis of ITS suggests that Sempervivoideae diversified rapidly throughout the Paleocene and Eocene, possibly in the area of the former Tethys and Paratethys archipelago. A biogeographic pattern emerges in which migration out of this ancestral area is linked to pronounced morphological evolution resulting in several distinct lineages recognized as segregate genera thought to be derived from Sedum. These segregate genera, however, have been defined on the basis of strongly homoplasious characters such as degree of petal fusion, petal colouration or flower merism. Moreover, all character states currently used for the delimitation of segregate genera seem to be homoplasious, and each of them can be found in at least one species of Sedum. Extensive literature work led to the conclusion that only few of the monophyletic clades found by us can be defined unambiguously by morphological characters. Mainly for these two reasons, we believe that combination of all 14 genera currently recognized in tribe Sedeae (= clades Leucosedum plus Acre) into Sedum might be the most stable solution of the “Sedum problem”. This new Sedum s.l. would then comprise approximately 755 species.

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Thompsonella and the “Echeveria group” (Crassulaceae): phylogenetic relationships based on molecular and morphological characters

Carrillo-Reyes

Sosa

Mort

2008

TAXON

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Broad phylogenetic analyses of Crassulaceae have retrieved a large clade comprising as much as one‐third of the species diversity present in the family as a whole. This so‐called Acre clade (Sedoideae) includes familiar genera such as Echeveria, Graptopetalum, and Thompsonella, and while it is consistently recovered in studies at the family level, relationships within the clade as well as the monophyly of many of the constituant genera have yet to be established. Results of a phylogenetic study of a genus within the Acre clade, Thompsonella, are here reported. Morphological evidence was gathered and molecular (nuclear ETS and ITS) DNA sequences were generated for forty‐seven taxa from the Acre clade, including all recognized members of Thompsonella. Parsimony analysis of the combined data retrieved Thompsonella as a monophyletic group and retrieved species in Graptopetalum, Thompsonella, Echeveria, Pachyphytum and Sedum sect. Pachysedum in a clade; this group was previously identified as the “Echeveria group”. Results indicate that only a few genera in the Acre clade are monophyletic and that to establish their generic limits further sampling mainly in the large Echeveria and Sedum genera is needed. Results from morphological and molecular analyses disagree in the position of T. mixtecana. However, an additional restricted analysis performed solely with cpDNA (rps16) placed this species within Thompsonella, suggesting a hybrid origin.

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Phylogenetic relationships and morphological patterns in Graptopetalum (Crassulaceae)

Cited by 8 publications

References 6 publications

A molecular phylogenetic study of Graptopetalum (Crassulaceae) based on ETS, ITS, RPL16, and TRNL‐F nucleotide sequences

A molecular phylogenetic study of Graptopetalum (Crassulaceae) based on ETS, ITS, RPL16, and TRNL‐F nucleotide sequences

Linnaeus's folly – phylogeny, evolution and classification of Sedum (Crassulaceae) and Crassulaceae subfamily Sempervivoideae

Thompsonella and the “Echeveria group” (Crassulaceae): phylogenetic relationships based on molecular and morphological characters

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