Chromosome Numbers in Some Cacti of Western North America — IX

Baker, Marc A.; Pinkava, Donald J.

doi:10.2985/026.025.0103

Cited by 9 publications

(19 citation statements)

References 65 publications

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“…Grusonia wrightiana (E.M.Baxter) E.M. Baxter has long been confused with G. kunzei as a result of a nomenclatural problem (Felger et al., ), so material used in Bárcenas () may be referrable to G. wrightiana instead of G. kunzei , hence the topological differences. We did not sample G. wrightiana to test this hypothesis, because it is tetraploid (Baker and Pinkava, ); however, the placement of G. kunzei with G. parishii in our analyses is in line with morphology, as the two very closely resemble one another (Felger et al., ). Griffith and Porter () resolved G. invicta in a subclade with G. aggeria (Ralston & Hilsenb.)…”

Section: Discussionmentioning

confidence: 90%

“…These two taxa intergrade in the northern and western part of the range of C. ganderi (Pinkava, ; M. A. Baker, M. Cloud‐Hughes, and J. P. Rebman, personal observation), which may further indicate their close relationship. The most useful solution to this scenario is to recognize those two taxa as separate species (see Baker and Pinkava, ). Cylindropuntia californica var.…”

Section: Discussionmentioning

confidence: 99%

“…imbricata (M. A. Baker, personal observation). On the basis of these phylogenetic data, as well as morphological characters and introgressive populations between C. imbricata and C. spinosior , Baker and Pinkava () have recircumscribed C. spinosior as a variety of C. imbricata .…”

Section: Discussionmentioning

confidence: 99%

“…Considering our knowledge of ploidy in this group (Baker and Pinkava, ), we took a diploids‐only approach to phylogeny reconstruction of the chollas s.l. to try to minimize potential topological misinterpretations by incorporating allopolyploids, and thus taxa of potentially reticulate origin, into phylogenetic analyses ( sensu Majure et al., ).…”

Section: Methodsmentioning

confidence: 99%

“…(packrats or woodrats; Thompson et al., ; Jansen, ; Van Devender, ; Betancourt et al., ), as well as their broad prehistoric and historical use by humans (Diguet, ; Bravo‐Hollis and Sánchez‐Mejorada, ; Felger and Moser, ; Minnis, ; Reinhard and Hevly, ; Hodgson, ; Riley, ). Lastly, the development of a robust diploid phylogeny will enable us to more rigorously test parentage of putative auto‐/allopolyploids in the group (see Baker and Pinkava, , , ; Mayer et al., , ; Pinkava, ; Baker and Cloud‐Hughes, ).…”

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confidence: 99%

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Phylogenomics in Cactaceae: A case study using the chollas sensu lato (Cylindropuntieae, Opuntioideae) reveals a common pattern out of the Chihuahuan and Sonoran deserts

Majure

Baker

Cloud-Hughes³

et al. 2019

American J of Botany

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Premise Although numerous phylogenetic studies have been conducted in Cactaceae, whole‐plastome datasets have not been employed. We used the chollas to develop a plastome dataset for phylogeny reconstruction to test species relationships, biogeography, clade age, and morphological evolution. Methods We developed a plastome dataset for most known diploid members of the chollas (42 taxa) as well as for other members of Cylindropuntieae. Paired‐end, raw reads from genome skimming were reference‐mapped onto a de novo plastome assembly of one species of cholla, Cylindropuntia bigelovii, and were used to build our plastome dataset, which was analyzed using various methods. Results Our plastome dataset resolved the phylogeny of the chollas, including most interspecific and intraspecific relationships. Tribe Cylindropuntieae arose ~18 mya, during the early Miocene in southern South America, and is supported as sister to the South American clade Tephrocacteae. The (Micropuntia (Cylindropuntia + Grusonia)) clade most likely originated in the Chihuahuan Desert region around 16 mya and then migrated into other North American desert regions. Key morphological characters for recognizing traditional taxonomic series in Cylindropuntia (e.g., spiny fruit) are mostly homoplasious. Conclusions This study provides the first comprehensive plastome phylogeny for any clade within Cactaceae. Although the chollas s.l. are widespread throughout western North American deserts, their most recent common ancestor likely arose in the Chihuahuan Desert region during the mid‐Miocene, with much of their species diversity arising in the early to mid‐Pliocene, a pattern strikingly similar to those found in other western North American desert groups.

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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Phylogenomics in Cactaceae: A case study using the chollas sensu lato (Cylindropuntieae, Opuntioideae) reveals a common pattern out of the Chihuahuan and Sonoran deserts

Majure

Baker

Cloud-Hughes³

et al. 2019

American J of Botany

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Pleistocene aridification underlies the evolutionary history of the Caribbean endemic, insular, giantConsolea(Opuntioideae)

Majure

Barrios

Díaz³

et al. 2021

American J of Botany

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Premise The Caribbean islands are in the top five biodiversity hotspots on the planet; however, the biogeographic history of the seasonally dry tropical forest (SDTF) there is poorly studied. Consolea consists of nine species of dioecious, hummingbird‐pollinated tree cacti endemic to the West Indies, which form a conspicuous element of the SDTF. Several species are threatened by anthropogenic disturbance, disease, sea‐level rise, and invasive species and are of conservation concern. However, no comprehensive phylogeny yet exists for the clade. Methods We reconstructed the phylogeny of Consolea, sampling all species using plastomic data to determine relationships, understand the evolution of key morphological characters, and test their biogeographic history. We estimated divergence times to determine the role climate change may have played in shaping the current diversity of the clade. Results Consolea appears to have evolved very recently during the latter part of the Pleistocene on Cuba/Hispaniola likely from a South American ancestor and, from there, moved into the Bahamas, Jamaica, Puerto Rico, Florida, and the Lesser Antilles. The tree growth form is a synapomorphy of Consolea and likely aided in the establishment and diversification of the clade. Conclusions Pleistocene aridification associated with glaciation likely played a role in shaping the current diversity of Consolea, and insular gigantism may have been a key innovation leading to the success of these species to invade the often‐dense SDTF. This in‐situ Caribbean radiation provides a window into the generation of species diversity and the complexity of the SDTF community within the Antilles.

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Supporting a young age for the North American deserts: Historical biogeography of Grusonia (Cylindropuntieae) in a Plio‐Pleistocene temporal framework

Bárcenas

Hernández

2022

TAXON

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Grusonia is an opuntioid genus in the Cylindropuntieae, Cactaceae, endemic to the North American deserts in Mexico and the United States. The monophyletic status of the genus and the degrees of endemicity of its species make Grusonia a suitable study group in order to test biogeographic hypotheses such as vicariant or dispersal events, biogeographic barriers and time-calibrated phylogenies in order to propose speciation events in the group. The statistical dispersal-vicariance analysis (S-DIVA) and a statistical dispersal-local extinction-cladogenesis (S-DEC) analyses show general congruence postulating ancestral ranges for the species of Grusonia. They disagree, however, in a clade with four species from the Sonoran Desert, the Baja California Peninsula and one species endemic to the central portion of the Chihuahuan Desert Region. The time-calibrated phylogeny here proposed shows an average age of 3.7 Ma for the genus. Grusonia has two internal clades comprising species most likely generated by allopatric speciation under a vicariant scenario. The results of this study support a young age for the North American deserts and identify the end of the Pliocene and mainly the Plio-Pleistocene boundary as the starting point of the cladogenetic events that gave rise to the two main clades of Grusonia.

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Chromosome Numbers in Some Cacti of Western North America — IX

Cited by 9 publications

References 65 publications

Phylogenomics in Cactaceae: A case study using the chollas sensu lato (Cylindropuntieae, Opuntioideae) reveals a common pattern out of the Chihuahuan and Sonoran deserts

Phylogenomics in Cactaceae: A case study using the chollas sensu lato (Cylindropuntieae, Opuntioideae) reveals a common pattern out of the Chihuahuan and Sonoran deserts

Pleistocene aridification underlies the evolutionary history of the Caribbean endemic, insular, giantConsolea(Opuntioideae)

Supporting a young age for the North American deserts: Historical biogeography of Grusonia (Cylindropuntieae) in a Plio‐Pleistocene temporal framework

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