Phylogenetic re-assessment of the delimitation of Plocama and its species relationships and limits (Rubiaceae, Putorieae): resurrection of the monospecific genus Aitchisonia and a description of trib. nov. Aitchisonieae

Bordbar, Firouzeh; Mirtadzadini, Mansour; Razafimandimbison, Sylvain G.

doi:10.1007/s00606-021-01799-4

Cited by 3 publications

(20 citation statements)

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“…While obvious morphological similarities supporting the Theligoneae + Rubieae clade seem to be lacking ( Ehrendorfer et al, 2018 ) there are some morphological characters shared between some Putorieae species and members of clades within Rubieae ( Natali et al, 1995 ; Ehrendorfer et al, 2018 ). Interestingly a recent study ( Bordbar et al, 2021 ) found on the basis of the plastid trnL-F marker that Plocama rosea (Hemsl. ex Aitch.)…”

Section: Discussionmentioning

confidence: 99%

“…ex Aitch., and described the new monogeneric tribe Aitchisonieae to accommodate A. rosea . However, based on nrITS data the placement of Plocama rosea was inconclusive ( Bordbar et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…In total, Wikström et al (2020) recognized 27 tribes in the subfamily Rubioideae in their summary, based on previous molecular phylogenetic studies. Recently two additional monospecific tribes have been described; the tribe Seychelleeae, which is sister to the tribe Colletoecemateae ( Razafimandimbison et al, 2020 ), and the tribe Aitchinsonieae, which is placed in the Putorieae-Rubieae-Theligoneae clade (also referred to as the Rubieae complex, Bordbar et al, 2021 ). The Rubioideae thus include the two major groups the Psychotrieae and the Spermacoceae alliances, and seven additional tribes: Colletoecemateae, Seychelleeae, Urophylleae, Ophiorrhizeae, Lasiantheae, Perameae, and Coussareeae.…”

Section: Introductionmentioning

confidence: 99%

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Target capture data resolve recalcitrant relationships in the coffee family (Rubioideae, Rubiaceae)

et al. 2022

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Subfamily Rubioideae is the largest of the main lineages in the coffee family (Rubiaceae), with over 8,000 species and 29 tribes. Phylogenetic relationships among tribes and other major clades within this group of plants are still only partly resolved despite considerable efforts. While previous studies have mainly utilized data from the organellar genomes and nuclear ribosomal DNA, we here use a large number of low-copy nuclear genes obtained via a target capture approach to infer phylogenetic relationships within Rubioideae. We included 101 Rubioideae species representing all but two (the monogeneric tribes Foonchewieae and Aitchinsonieae) of the currently recognized tribes, and all but one non-monogeneric tribe were represented by more than one genus. Using data from the 353 genes targeted with the universal Angiosperms353 probe set we investigated the impact of data type, analytical approach, and potential paralogs on phylogenetic reconstruction. We inferred a robust phylogenetic hypothesis of Rubioideae with the vast majority (or all) nodes being highly supported across all analyses and datasets and few incongruences between the inferred topologies. The results were similar to those of previous studies but novel relationships were also identified. We found that supercontigs [coding sequence (CDS) + non-coding sequence] clearly outperformed CDS data in levels of support and gene tree congruence. The full datasets (353 genes) outperformed the datasets with potentially paralogous genes removed (186 genes) in levels of support but increased gene tree incongruence slightly. The pattern of gene tree conflict at short internal branches were often consistent with high levels of incomplete lineage sorting (ILS) due to rapid speciation in the group. While concatenation- and coalescence-based trees mainly agreed, the observed phylogenetic discordance between the two approaches may be best explained by their differences in accounting for ILS. The use of target capture data greatly improved our confidence and understanding of the Rubioideae phylogeny, highlighted by the increased support for previously uncertain relationships and the increased possibility to explore sources of underlying phylogenetic discordance.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Target capture data resolve recalcitrant relationships in the coffee family (Rubioideae, Rubiaceae)

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“…& J. Presl, and Theligoneae Baill. (Rydin et al 2009, Wen and Wang 2012, Ginter et al 2015, Bordbar et al 2022).…”

Section: Resultsmentioning

confidence: 99%

“…In the current circumscription, this genus includes seven lineages and around 35 species of shrubs. Most of them occur in arid habitats in Western Asia and have fruits that split into two dry mericarps (Backlund et al 2007, Rydin et al 2009, Rincón‐Barrado et al 2021, Bordbar et al 2022).…”

Section: Resultsmentioning

confidence: 99%

New chromosome counts on Rubiaceae from Africa and the Western Indian Ocean islands

Kiehn

Berger

2023

Nordic Journal of Botany

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Cytological studies can provide important insights into circumscription and relationships within plant groups. Nevertheless, there is a considerable lack of cytological information, especially for large and complex groups such as the coffee family (Rubiaceae) and for plants from Africa and the Western Indian Ocean islands. In the present study, 110 new chromosome counts are reported, and one identification for a count published on generic level is provided for the area. Altogether cytological data on 98 species and subspecific taxa classified in 57 genera and 22 tribes are presented. These include first counts for 12 genera and 60 species. Based on a review of recent molecular phylogenetic studies, the significance of these results for the systematics of the Rubiaceae is briefly discussed.

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Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook

Razafimandimbison,

Rydin

2024

TAXON

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The use of molecular data in phylogenetic reconstruction during more than three decades has greatly improved our understanding of the macroevolutionary history of the coffee family (Rubiaceae) and has provided a solid basis for improvement of its classification. Based on the results of 130 studies, among them most recent phylogenomic works, we present a consensus phylogeny and a robust classification of Rubiaceae that shed light on the evolutionary success of this highly diverse angiosperm family and can serve as a framework for ecological and evolutionary studies. There are more than 14,000 species and about 580 accepted genera of Rubiaceae that are assigned to 71 tribes, of which 68 are classified in two subfamilies (Dialypetalanthoideae with 38 tribes and Rubioideae with 30 tribes). Three tribes (Acranthereae, Coptosapelteae, Luculieae) remain unclassified as to subfamily. Sixty‐three of these 71 tribes are assigned to nine informal alliances (four in Rubioideae and five in Dialypetalanthoideae). These tribes are listed in alphabetical order within their respective alliances. Five tribes, one (Coussareeae) in Rubioideae and four (Airospermeae, Jackieae, Retiniphylleae, Steenisieae) in Dialypetalanthoideae, are excluded from these alliances due to unclear or conflicting phylogenetic positions. Thirty‐six tribes retain their tribal status but receive new generic limits to remedy their previous para‐ or polyphyletic nature. Twenty‐nine tribes not implemented in previous classifications have been added, of which three (Chioneae, Glionnetieae, Temnopterygeae) are newly described here. Basic information on phylogenies, distributions, former classifications, and useful references to previous works are provided for all accepted tribes, and future perspectives are discussed.

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Phylogenetic re-assessment of the delimitation of Plocama and its species relationships and limits (Rubiaceae, Putorieae): resurrection of the monospecific genus Aitchisonia and a description of trib. nov. Aitchisonieae

Cited by 3 publications

References 23 publications

Target capture data resolve recalcitrant relationships in the coffee family (Rubioideae, Rubiaceae)

Target capture data resolve recalcitrant relationships in the coffee family (Rubioideae, Rubiaceae)

New chromosome counts on Rubiaceae from Africa and the Western Indian Ocean islands

Phylogeny and classification of the coffee family (Rubiaceae, Gentianales): Overview and outlook

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