ArticleAnnals of botany2015
Seed bank dynamics govern persistence of Brassica hybrids in crop and natural habitats.
Article in Annals of botany, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Persistence of genetically engineered canola populations in the U.S. and the adventitious presence of transgenes in the environment.PloS one · 2024Article
- Article
- Variable pollen viability and effects of pollen load size on components of seed set in cultivars and feral populations of oilseed rape.PloS one · 2018Article
- Assessing the effects of hybridization and precipitation on invasive weed demography using strength of selection on vital rates.BMC evolutionary biology · 2016Article
- Applying gene flow science to environmental policy needs: a boundary work perspective.Evolutionary applications · 2016Article
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Authors and funding
8 authors.
Funding
Abstract
BACKGROUND AND
aimsGene flow from crops to their wild relatives has the potential to alter population growth rates and demography of hybrid populations, especially when a new crop has been genetically modified (GM). This study introduces a comprehensive approach to assess this potential for altered population fitness, and uses a combination of demographic data in two habitat types and mathematical (matrix) models that include crop rotations and outcrossing between parental species.
methodsFull life-cycle demographic rates, including seed bank survival, of non-GM Brassica rapa × B. napus F1 hybrids and their parent species were estimated from experiments in both agricultural and semi-natural habitats. Altered fitness potential was modelled using periodic matrices including crop rotations and outcrossing between parent species. KEY
resultsThe demographic vital rates (i.e. for major stage transitions) of the hybrid population were intermediate between or lower than both parental species. The population growth rate (λ) of hybrids indicated decreases in both habitat types, and in a semi-natural habitat hybrids became extinct at two sites. Elasticity analyses indicated that seed bank survival was the greatest contributor to λ. In agricultural habitats, hybrid populations were projected to decline, but with persistence times up to 20 years. The seed bank survival rate was the main driver determining persistence. It was found that λ of the hybrids was largely determined by parental seed bank survival and subsequent replenishment of the hybrid population through outcrossing of B. rapa with B. napus.
conclusionsHybrid persistence was found to be highly dependent on the seed bank, suggesting that targeting hybrid seed survival could be an important management option in controlling hybrid persistence. For local risk mitigation, an increased focus on the wild parent is suggested. Management actions, such as control of B. rapa, could indirectly reduce hybrid populations by blocking hybrid replenishment.
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