Slug herbivory on hybrids of the crop Brassica napus and its wild relative B. rapa

Some plant species can cross with each other but stay nevertheless distinct with little gene flow between them. Selective herbivory could explain this pattern when hybrids are more susceptible or intermediate between their parents. We performed choice and no-choice experiments with the slug Arion lu...

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Bibliographic Details
Published in:Basic and applied ecology 2018-09, Vol.31, p.52-60
Main Authors: Baaij, B. Martina, Kim, Hye Kyong, Grosser, Katharina, Worrich, Anja, de Jong, Tom J.
Format: Article
Language:English
Subjects:
Aneuploidy
Arion lusitanicus
DNA content
Genetic modification
Glucosinolates
Introgression
Plant defence
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Summary:Some plant species can cross with each other but stay nevertheless distinct with little gene flow between them. Selective herbivory could explain this pattern when hybrids are more susceptible or intermediate between their parents. We performed choice and no-choice experiments with the slug Arion lusitanicus to test this hypothesis for the crop Brassica napus, wild B. rapa and their backcross hybrids. In both experiments slugs greatly preferred B. napus over B. rapa while average herbivory on backcross hybrids was intermediate. Concentrations of aliphatic glucosinolates in the hybrids were intermediate between the parental species. Slug herbivory potentially reduces establishment of backcross hybrids. This hypothesis needs to be tested in the field.
ISSN:1439-1791
DOI:10.1016/j.baae.2018.06.001