Dataset Information

A new disjunct species of Eriolaena (Malvaceae, Dombeyoideae) from Continental Africa.

ABSTRACT: Eriolaenarulkensii Dorr, sp. nov. is described and illustrated. This attractive shrub is endemic to coastal Mozambique. The new species has apically winged seeds, which place it in a group of Malvaceae (Dombeyoideae) that is found in Asia and Madagascar and which had not previously been found in continental Africa.

SUBMITTER: Dorr LJ

PROVIDER: S-EPMC6234222 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature

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A new disjunct species of Eriolaena (Malvaceae, Dombeyoideae) from Continental Africa.

Dorr Laurence J LJ Wurdack Kenneth J KJ

PhytoKeys 20181106 111

Eriolaenarulkensii Dorr, sp. nov. is described and illustrated. This attractive shrub is endemic to coastal Mozambique. The new species has apically winged seeds, which place it in a group of Malvaceae (Dombeyoideae) that is found in Asia and Madagascar and which had not previously been found in continental Africa. ...[more]

PMID: 30473615

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Project description:Background and aimsReproductive systems enabling opportunities for self-fertilization influence population genetic structure and play a key role in colonization and genetic differentiation during range expansion. Because of their well-developed powers of dispersal, aquatic plants often have widespread disjunct geographical distributions, providing opportunities to investigate the role of reproductive systems in structuring genetic variation between parts of the range that differ in migration history and ecology.MethodsWe compared reproductive systems and spatial genetic structure of the freshwater aquatic macrophyte Sagittaria latifolia between disjunct western and eastern ranges of North America (NA). Populations of this species are most commonly either monoecious or dioecious. We examined chloroplast DNA haplotype variation to test the hypothesis that the western range of this species represents a secondary colonization from the east, and evaluated the roles of reproductive system differences and geography in structuring contemporary patterns of genetic variation at 11 polymorphic SSR (simple sequence repeat) loci.Key resultsChloroplast haplotyping revealed a single haplotype in western NA compared to numerous haplotypes in eastern NA, consistent with a genetic bottleneck during westward migration. Estimates of genetic diversity in eastern NA populations differed significantly between reproductive systems, but this pattern was not evident in the western range. Eastern populations could be reliably assigned to genetic clusters based on their reproductive systems, whereas western populations clustered primarily by geographical location.ConclusionsThe sparser distribution of aquatic habitats in the drier western range of S. latifolia, combined with secondary colonization of this region, probably cause the lower genetic diversity and increased differentiation among populations, possibly overriding the effects of reproductive system evident in the eastern portion of the range. Our findings demonstrate that the complex interplay between migratory history, reproductive systems and habitat availability plays an important role in structuring spatial patterns of genetic variation in disjunct plant populations.

Dataset Information

A new disjunct species of Eriolaena (Malvaceae, Dombeyoideae) from Continental Africa.

Publications

A new disjunct species of <i>Eriolaena</i> (Malvaceae, Dombeyoideae) from Continental Africa.

Similar Datasets

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