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Abstract Detail

The Botany of Invasions

Turner, Kathryn G [1].

Using herbarium genomics to understand genetic and phytobiome change in invaded novel environments.

Invasive species represent excellent opportunities to study the evolutionary potential of traits and biotic interactions important to success in novel environments. While evolutionary studies often describe adaptation to novel environments over millions of years, rapid evolution can occur over decades, in species under strong selective pressure, such as invasive species. Typically, our knowledge of rapid evolution in contemporary populations is based on current and static patterns of genetic variation in those populations. Since static patterns may be the result of multiple and opposing processes, such patterns reveal little about the initial stages or key transitions of rapid adaptation to environmental change. Another key gap in our understanding of the process of adaptation to novel environments in plants is the interaction between available genetic diversity in the adapting species and that species’ microbiome. Microbiomes are part of a host’s ‘extended phenotype’ and can increase an organism’s capacity for adaptation to environmental change. Temporally referenced data may help us understand how this interaction enables species to adapt to rapid environmental change. Genomic analyses are powerful tools to understand the evolutionary processes affecting plant populations and their microbiomes through time. We use genomic data from historical herbarium specimens to directly observe changes in genetic variation in target species through time, and associate that with change in their leaf microbial communities. We use specimens of blue mustard (Chorispora tenella, Brassicaceae), a widespread noxious invasive weed, collected throughout the North American West to investigate the evolutionary ecology of invasive species. We present preliminary analyses of whole genome libraries of 20 herbarium specimens of C. tenella collected from the North American invaded range between 1941 and 1993, and their associated microbiomes. Most of these collections are from the region of one of the earliest collection sites in North America for this non-native species. This work includes the first de novo reference assembly from a contemporary C. tenella individual.

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Related Links:
Turner lab website

1 - Idaho State University, Biological Sciences, 921 South 8th Ave., Stop 8007, Pocatello, Idaho, 83209, US

evolutionary ecology
Chorispora tenella (Brassicaceae).

Presentation Type: Symposium Presentation
Session: SY2, The Botany of Invasions
Location: /
Date: Monday, July 19th, 2021
Time: 1:30 PM(EDT)
Number: SY2008
Abstract ID:131
Candidate for Awards:None

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