Title: Genetic consequences of using seed mixtures in restoration : a case study of a wetland plant Lychnis flos-cuculi
Authors : Aavik, Tsipe
Edwards, Peter J.
Holderegger, Rolf
Graf, René
Billeter, Regula
Published in : Biological Conservation
Volume(Issue) : 145
Issue : 1
Pages : 195
Pages to: 204
Publisher / Ed. Institution : Elsevier
Issue Date: 2012
Language : Englisch / English
Subjects : Ex situ propagation; Fitness; Genetic diversity; Genetic structure; Inbreeding
Subject (DDC) : 580: Pflanzen (Botanik) / Plants (Botany)
Abstract: Sowing with seed mixtures is a common practice in restoring species-rich communities in areas with impoverished species pools. The potential genetic consequences of using these mixtures, however, are poorly understood and often not considered in practical restoration. We investigated genetic diversity, inbreeding and genetic structure of samples collected from 26 populations of the common wetland plant species Lychnis flos-cuculi in an agricultural region in Switzerland. Some of these populations were natural, while others had been sown several years ago. This enabled us to compare the genetic composition of populations of indigenous origin with those originating from commercially produced seed mixtures. Gene diversity and allelic richness were similar in natural and sown populations. In contrast, inbreeding coefficients were three times higher in sown than in natural populations. The sown populations were genetically distinct from the native populations. We distinguished two homogeneous gene pools that presumably originated from different source populations used to produce seed mixtures. The use of commercially produced seeds may alter the genetic diversity and structure of plant populations. The observed higher inbreeding coefficients of sown populations could lead to reduced population viability. To restore genetically diverse populations, the seeds for further propagation should be collected from numerous individuals in large and non-isolated populations nearby restored sites. Ex situ stocks for the production of commercial seed mixtures should only be propagated for a few generations to avoid negative effects such as inbreeding or loss of local adaptation.
Departement: Life Sciences und Facility Management
Organisational Unit: Institut für Umwelt und Natürliche Ressourcen (IUNR)
Publication type: Beitrag in wissenschaftlicher Zeitschrift / Article in scientific Journal
Type of review: Peer review (Publikation)
DOI : 10.1016/j.biocon.2011.11.004
ISSN: 0006-3207
URI: https://digitalcollection.zhaw.ch/handle/11475/7751
License (according to publishing contract) : Lizenz gemäss Verlagsvertrag / Licence according to publishing contract
Appears in Collections:Publikationen Life Sciences und Facility Management

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