Self-Compatibility in Lomatium dissectum (Apiaceae) and the Diverse Andrena Bees that Dominate Regional Lomatium Pollinator Faunas

Cane, James H.; Weber, Melissa; Love, Byron

doi:10.3398/064.080.0101

Cited by 3 publications

(1 citation statement)

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“…anomalum subcomplex is likely a combination of periodic populations newly founded by few individuals, ILS caused by incipient or recent speciation, phenotypic plasticity in response to ecological parameters, and geographic structuring in the nuclear genome due to limited gene flow from pollinators with short travel distances (Cane et al, 2020 ) and no clear mechanism for seed dispersal. Although we base our conclusions on some known studies of pollinators (Cane et al, 2020 ) and the data we recovered here that indicates the presence of ILS in geographically structured populations, we are limited in that studies have yet to be done on founding populations and phenotypic plasticity. To our knowledge, there are no population genetic studies that might verify that populations of Lomatium are founded by few individuals.…”

Section: Discussionmentioning

confidence: 99%

Resolving species boundaries in a recent radiation with the Angiosperms353 probe set: the Lomatium packardiae/L. anomalum clade of the L. triternatum (Apiaceae) complex

Ottenlips¹,

Mansfield

Buerki³

et al. 2021

American J of Botany

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Speciation not associated with morphological shifts is challenging to detect unless molecular data are employed. Using Sanger-sequencing approaches, the Lomatium packardiae/L. anomalum subcomplex within the larger Lomatium triternatum complex could not be resolved. Therefore, we attempt to resolve these boundaries here. METHODS:The Angiosperms353 probe set was employed to resolve the ambiguity within Lomatium triternatum species complex using 48 accessions assigned to L. packardiae, L. anomalum, or L. triternatum. In addition to exon data, 54 nuclear introns were extracted and were complete for all samples. Three approaches were used to estimate evolutionary relationships and define species boundaries: STACEY, a Bayesian coalescent-based species tree analysis that takes incomplete lineage sorting into account; ASTRAL-III, another coalescent-based species tree analysis; and a concatenated approach using MrBayes. Climatic factors, morphological characters, and soil variables were measured and analyzed to provide additional support for recovered groups. RESULTS:The STACEY analysis recovered three major clades and seven subclades, all of which are geographically structured, and some correspond to previously named taxa. No other analysis had full agreement between recovered clades and other parameters. Climatic niche and leaflet width and length provide some predictive ability for the major clades. CONCLUSIONS:The results suggest that these groups are in the process of incipient speciation and incomplete lineage sorting has been a major barrier to resolving boundaries within this lineage previously. These results are hypothesized through sequencing of multiple loci and analyzing data using coalescent-based processes.

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Section: Discussionmentioning

confidence: 99%