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Journal Article

Phylogenetic Analysis of the African Genus Gilbertiodendron J. Léonard and Related Genera (Leguminosae-Caesalpinioideae-Detarieae)

Manuel de la Estrella, Jan J. Wieringa, Barbara Mackinder, Xander van der Burgt, Juan A. Devesa and Anne Bruneau
International Journal of Plant Sciences
Vol. 175, No. 9 (November/December 2014), pp. 975-985
DOI: 10.1086/677648
Stable URL: http://www.jstor.org/stable/10.1086/677648
Page Count: 11
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Phylogenetic Analysis of the African Genus Gilbertiodendron J. Léonard and Related Genera (Leguminosae-Caesalpinioideae-Detarieae)
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Abstract

Premise of research. Gilbertiodendron is a genus endemic to Africa with ∼30 species made up of trees of primary dry-land, riverine, and gallery forests. Recently, the west and central African monotypic genus Pellegriniodendron was merged into Gilbertiodendron. Gilbertiodendron is one of 17 genera that form the exclusively African Berlinia clade, and this study presents the findings of a phylogenetic analysis designed to evaluate the generic limits of Gilbertiodendron and its relationships within the Berlinia clade.Methodology. To test the monophyly of Gilbertiodendron and its relationships with other genera, we analyzed nucleotide sequence data from the nuclear ribosomal internal transcribed spacer and the plastid trnL intron and trnL-F intergenic spacer, using parsimony and Bayesian analyses.Pivotal results. Gilbertiodendron is recovered as monophyletic, including all the samples previously recognized as Pellegriniodendron diphyllum.Conclusions. The placement of Pellegriniodendron in synonymy with Gilbertiodendron is supported by our results. Our analyses suggest that G. diphyllum is the same taxon on both sides of the Dahomey Gap. The G. ogoouense complex is a monophyletic group of species that needs a new taxonomic framework and within which several new species will be described. The phylogenetic framework presented here and the ongoing taxonomic revision should provide the baseline data required for adequate assessment of this group of tree species, of which only eight have been assessed under the International Union for Conservation of Nature’s Red List criteria.

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