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Abstract Detail

Darwins' reversals: What we now know about Feralization and Crop Wild Relatives

McAlvay, Alex [1], Ragsdale, Aaron [2], Bird, Kevin [3], Pires, Chris [3], Emshwiller, Eve [4].

Reconstructing the dedomestication and invasion history of field mustard (Brassica rapa).

Biological invasions can drive ecological change and impact agricultural production. Reconstructing the invasion history of weedy plant populations contributes to the understanding of dispersal and range expansion as well as biological control. Field mustard, a weedy form of the crop species Brassica rapa has colonized croplands, waste areas, and roadsides in temperate regions worldwide. Its status as an economically important crop plant has led to considerable genomic tools, making it a potential model to study invasion genetics but the origins, route(s) of invasion, diversity, and genetic structure of weedy forms are poorly understood. Here, we used a combination of genotyping-by-sequencing and niche modeling to reconstruct the dedomestication and invasion history of B. rapa in the Americas, Europe, and New Zealand and model the potential distribution of B. rapa worldwide. Levels of diversity in the invaded and native range were comparable, with relatively high diversity in the invasive Argentine, Colombian, and Canadian weeds. Tree-based and genetic structure analyses indicated an affiliation between European/Canadian feral forms and European turnips, with evidence for introgression from wild forms. Latin American and New Zealand weeds were closely associated with each other and with European turnips and weeds, but also with European leafy crops.

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1 - New York Botanical Garden, 2900 Southern Blvd, The Bronx, NY, 10458, United States
2 - LANGEBIO, Libramiento Norte León, Irapuato, GTO, 36821, Mexico
3 - University Of Missouri, 371 Bond Life Sciences Center, 1201 Rollins Street, Columbia, MO, 65211, United States
4 - UW-Madison, Botany Dept, 430 Lincoln Drive, 321 Birge Hall, Madison, WI, 53706, United States

invasive plants
crop wild relative

Presentation Type: Colloquium Presentations
Session: C03, Darwins' reversals: What we now know about Feralization and Crop Wild Relatives
Location: /
Date: Tuesday, July 20th, 2021
Time: 1:00 PM(EDT)
Number: C03012
Abstract ID:272
Candidate for Awards:None

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