Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 418317
Title Are hybrid species more fit than ancestral parent species in the current hybrid species habitats?
Author(s) Donovan, L.A.; Rosenthal, D.R.; Sanchez-Velenosi, M.; Rieseberg, L.H.; Ludwig, F.
Source Journal of Evolutionary Biology 23 (2010)4. - ISSN 1010-061X - p. 805 - 816.
Department(s) Earth System Science
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) carbon-isotope discrimination - leaf ecophysiological traits - great-basin desert - helianthus-deserticola - local adaptation - bromus-tectorum - phenotypic selection - mineral-nutrition - wild sunflowers - dune plants
Abstract Hybrid speciation is thought to be facilitated by escape of early generation hybrids into new habitats, subsequent environmental selection and adaptation. Here, we ask whether two homoploid hybrid plant species (Helianthus anomalus, H. deserticola) diverged sufficiently from their ancestral parent species (H. annuus, H. petiolaris) during hybrid speciation so that they are more fit than the parent species in hybrid species habitats. Hybrid and parental species were reciprocally transplanted into hybrid and parental habitats. Helianthus anomalus was more fit than parental species in the H. anomalus actively moving desert dune habitat. The abilities to tolerate burial and excavation and to obtain nutrients appear to be important for success in the H. anomalus habitat. In contrast, H. deserticola failed to outperform the parental species in the H. deserticola stabilized desert dune habitat, and several possible explanations are discussed. The home site advantage of H. anomalus is consistent with environmental selection having been a mechanism for adaptive divergence and hybrid speciation and supports the use of H. anomalus as a valuable system for further assessment of environmental selection and adaptive traits
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