Pollen morphology of Brunellia (Brunelliaceae) and related taxa in the Cunoniaceae

Orozco, Clara Inés

doi:10.1080/00173130152987490

Cited by 6 publications

(10 citation statements)

References 12 publications

(5 reference statements)

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“…Our analyses recovered Brunelliaceae as monophyletic with high support. This result was previously found in a study based on morphological characters (Orozco, 2001) and plastid markers (Bradford and Barnes, 2001). Also, all our analyses recovered two large clades in Brunelliaceae, 10 subclades and three isolated species.…”

Section: Discussionsupporting

confidence: 86%

“…In general, clade I is more broadly distributed than clade II. Brunellia species of clade I grow from Colombia to Peru and Bolivia, with one species, B. comocladiifolia Bonpl., widely distributed from Costa Rica to Ecuador, Venezuela, and the Greater Antilles (Cuatrecasas, 1970, 1985; Orozco, 2001). Species of clade II are mainly distributed in Colombia, Ecuador and Venezuela, but B. dulcis J.F.…”

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…We selected seven morphological characters used previously in traditional taxonomic treatments to define sections and subsections by Cuatrecasas (1970, 1985) and Orozco (2001). To delimit character states, we considered herbarium specimens and data from the Orozco study (2001) (Appendix S2), with terminology based on Orozco (2001). We evaluated leaf complexity, inflorescence complexity, fertile portion of the inflorescence, calyx merosity, ratio of carpel to calyx merosity, carpel number, and endocarp shape.…”

Section: Methodsmentioning

confidence: 99%

“…Brunellia has been divided into two sections and 13 subsections (Cuatrecasas, 1985) or more recently into five sections and four subsections in a morphology‐based phylogenetic study (Orozco, 2001). However, the monophyly of those taxonomic groups has not been tested to date using molecular characters.…”

mentioning

confidence: 99%

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Incomplete lineage sorting and reticulate evolution mask species relationships in Brunelliaceae, an Andean family with rapid, recent diversification

Murillo‐A.

Valencia-D

Orozco

et al. 2022

American J of Botany

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Premise To date, phylogenetic relationships within the monogeneric Brunelliaceae have been based on morphological evidence, which does not provide sufficient phylogenetic resolution. Here we use target‐enriched nuclear data to improve our understanding of phylogenetic relationships in the family. Methods We used the Angiosperms353 toolkit for targeted recovery of exonic regions and supercontigs (exons + introns) from low copy nuclear genes from 53 of 70 species in Brunellia, and several outgroup taxa. We removed loci that indicated biased inference of relationships and applied concatenated and coalescent methods to infer Brunellia phylogeny. We identified conflicts among gene trees that may reflect hybridization or incomplete lineage sorting events and assessed their impact on phylogenetic inference. Finally, we performed ancestral‐state reconstructions of morphological traits and assessed the homology of character states used to define sections and subsections in Brunellia. Results Brunellia comprises two major clades and several subclades. Most of these clades/subclades do not correspond to previous infrageneric taxa. There is high topological incongruence among the subclades across analyses. Conclusions Phylogenetic reconstructions point to rapid species diversification in Brunelliaceae, reflected in very short branches between successive species splits. The removal of putatively biased loci slightly improves phylogenetic support for individual clades. Reticulate evolution due to hybridization and/or incomplete lineage sorting likely both contribute to gene‐tree discordance. Morphological characters used to define taxa in current classification schemes are homoplastic in the ancestral character‐state reconstructions. While target enrichment data allows us to broaden our understanding of diversification in Brunellia, the relationships among subclades remain incompletely understood.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%