Phylogenomics of <i>Brosimum</i> (Moraceae) and allied genera, including a revised subgeneric system

Gardner, Elliot M.; Audi, Lauren; Zhang, Qian; Sauquet, Hervé; Monro, Alexandre K.; Zerega, Nyree J. C.

doi:10.1002/tax.12503

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…A. leiocarpa was also found to be prominent in several Atlantic Forest forests in Brazil (Carvalho et al, 2007;Ruschel et al, 2009). P. heptaphyllum, B. alicastrum, X. frutescens and P. elegans are very common species, occurring widely in almost all lowland forests in the Neotropics (Dionisio et al, 2016;Gardner et al, 2021;Hufford;Hamrick, 2003). Due to the greater richness, trees with greater DAP and for having only one nitrogen-fixing Fabaceae species among the prominent species, this forest seems to be the most advanced in the successional process among the TDFs in our study.…”

Section: Discussionmentioning

confidence: 99%

Structures of tropical dry forests in the Andes: forest conservation, composition and the role of fabaceae and myrtaceae

Galván-Cisneros,

Montaño,

Ojeda-Rodríguez

et al. 2023

CERNE

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Background: Tropical Dry Forests (TDFs) are repositories of biodiversity, ecosystem services and carbon that are threatened by fragmentation and climate change. Floristic and phytosociological studies are fundamental database for many studies of conservation and sustainability, but there is a knowledge gap concerning TDFs, especially in the Andes valleys. The aim of this study was to determine the phytosociological structure and composition of woody vegetation of seven TDFs in the Colombian Andes, and because the flora associated with this type of forest has a geographical distribution restricted to each locality where this biome exists, provide information on the main species, genera and families for conservation and restoration actions as well as for future metaanalyses. We sampled seven TDFs with 20 plots of 25 m × 4 m. Results:In the 1.88 hectares of samples, 8422 individuals were surveyed, distributed in 170 species, 120 genera and 50 botanical families. Of these species, 78.82% were identified at the species level, 17.05% at the genus level, and 4.11% at the family level. The most important families were Fabaceae and Myrtaceae. Nitrogen-fixing Fabaceae species were prominent amongst the important species, especially in low altitude and more stressing sites. Conclusion:The structure, composition and ecological importance of these forests must be considered for conservation and ecological restoration plans, in particular the habitat preference of species along the topographic gradient. Particularly noteworthy for conservation are the Myrtaceae species because promote connectivity and regeneration by providing resources for the fauna, a driver of dispersal, as well as nitrogen-fixing Fabaceae species, because promote the resilience and natural regeneration of TDFs in the Andes, a key feature of stability.

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Section: Discussionmentioning

confidence: 99%

Structures of tropical dry forests in the Andes: forest conservation, composition and the role of fabaceae and myrtaceae

Galván-Cisneros,

Montaño,

Ojeda-Rodríguez

et al. 2023

CERNE

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“…For reconstruction of historical biogeography, we first inferred a time-calibrated tree on an expanded set of taxa including species-level sampling for most of Moraceae plus select outgroups in Urticaceae, rooted with Trema orientale. Outgroups and other Moraceae were drawn from previous studies focusing on various clades in the family ( 27 , 34 , 54 , 55 , 76 ), supplemented by 30 samples newly sequenced for this study, mostly from Olmedieae, and publicly available reads from the NCBI Sequence Read Archive ( SI Appendix , Table S1 ). For Moraceae samples outside Ficeae and Olmedieae, sequences mostly consisted of the Moraceae333 loci, with some Angiosperms353 loci assembled from off-target reads, whereas Urticaceae samples were based on the Angiosperms353 loci.…”

Section: Methodsmentioning

confidence: 99%

Echoes of ancient introgression punctuate stable genomic lineages in the evolution of figs

Gardner

Bruun-Lund

Niissalo

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Studies investigating the evolution of flowering plants have long focused on isolating mechanisms such as pollinator specificity. Some recent studies have proposed a role for introgressive hybridization between species, recognizing that isolating processes such as pollinator specialization may not be complete barriers to hybridization. Occasional hybridization may therefore lead to distinct yet reproductively connected lineages. We investigate the balance between introgression and reproductive isolation in a diverse clade using a densely sampled phylogenomic study of fig trees ( Ficus , Moraceae). Codiversification with specialized pollinating wasps (Agaonidae) is recognized as a major engine of fig diversity, leading to about 850 species. Nevertheless, some studies have focused on the importance of hybridization in Ficus , highlighting the consequences of pollinator sharing. Here, we employ dense taxon sampling (520 species) throughout Moraceae and 1,751 loci to investigate phylogenetic relationships and the prevalence of introgression among species throughout the history of Ficus . We present a well-resolved phylogenomic backbone for Ficus , providing a solid foundation for an updated classification. Our results paint a picture of phylogenetically stable evolution within lineages punctuated by occasional local introgression events likely mediated by local pollinator sharing, illustrated by clear cases of cytoplasmic introgression that have been nearly drowned out of the nuclear genome through subsequent lineage fidelity. The phylogenetic history of figs thus highlights that while hybridization is an important process in plant evolution, the mere ability of species to hybridize locally does not necessarily translate into ongoing introgression between distant lineages, particularly in the presence of obligate plant–pollinator relationships.

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Genetic imprints of Brosimum alicastrum Sw. in Mexico

López-Barrera

Ochoa‐Zavala

Quesada

et al. 2021

American J of Botany

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The mechanisms generating the geographical distributions of genetic diversity are a central theme in evolutionary biology. The amount of genetic diversity and its distribution are controlled by several factors, including dispersal abilities, physical barriers, and environmental and climatic changes. We investigated the patterns of genetic diversity and differentiation among populations of the widespread species Brosimum alicastrum in Mexico. Methods: Using nuclear DNA microsatellite data, we tested whether the genetic structure of B. alicastrum was associated with the roles of the Trans-Mexican Volcanic Belt and the Isthmus of Tehuantepec as geographical barriers to gene flow and to infer the role of past events in the genetic diversity patterns. We further used a maximumlikelihood population-effects mixed model (MLPE) to identify the main factor affecting population differentiation in B. alicastrum. Results: Our results suggested that Mexican B. alicastrum is well differentiated into three main lineages. Patterns of the genetic structure at a finer scale did not fully correspond to the current geographical barriers to gene flow. According to the MLPE mixed model, isolation by distance is the best model for explaining the genetic differentiation of B. alicastrum in Mexico. Conclusions: We propose that the differentiation patterns might reflect (1) an ancient differentiation that occurred in Central and South America, (2) the effects of past climatic changes, and (3) the functions of some physical barriers to gene flow. This study provides insights into the possible mechanisms underlying the geographic genetic variation of B. alicastrum along a moisture gradient in tropical lowland forests.

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Phylogenomics of Brosimum (Moraceae) and allied genera, including a revised subgeneric system

Cited by 5 publications

References 41 publications

Structures of tropical dry forests in the Andes: forest conservation, composition and the role of fabaceae and myrtaceae

Structures of tropical dry forests in the Andes: forest conservation, composition and the role of fabaceae and myrtaceae

Echoes of ancient introgression punctuate stable genomic lineages in the evolution of figs

Genetic imprints of Brosimum alicastrum Sw. in Mexico

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