University of Stirling    STORRE: Stirling Online Research Repository University Circle Images   Research Led, Student Focused  
 

STORRE >
School of Natural Sciences >
Biological and Environmental Sciences >
Biological and Environmental Sciences Journal Articles >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/1469

Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Paternity analysis of pollen-mediated gene flow for Fraxinus excelsior L. in a chronically fragmented landscape
Author(s): Ennos, R A
Contact Email: c.f.bacles@stir.ac.uk
Keywords: Habitat fragmentation
landscape genetics
microsatellites
paternity assignment
Issue Date: Oct-2008
Publisher: Nature Publishing Group / The Genetics Society
Citation: Ennos RA (2008) Paternity analysis of pollen-mediated gene flow for Fraxinus excelsior L. in a chronically fragmented landscape, Heredity, 101 (4), pp. 368- 380.
Abstract: Paternity analysis based on microsatellite marker genotyping was used to infer contemporary genetic connectivity by pollen of three population remnants of the wind-pollinated, wind-dispersed tree Fraxinus excelsior, in a deforested Scottish landscape. By deterministically accounting for genotyping error and comparing a range of assignment methods, individual-based paternity assignments were used to derive population-level estimates of gene flow. Pollen immigration into a 300ha landscape represents between 43% and 68% of effective pollination, mostly depending on assignment method. Individual male reproductive success is unequal, with 31 of 48 trees fertilising one seed or more, but only three trees fertilising more than ten seeds. Spatial analysis suggests a fat-tailed pollen dispersal curve with 85% of detected pollination occurring within 100m, and 15% spreading between 300m and 1900m from the source. Identification of immigrating pollen sourced from two neighbouring remnants indicates further effective dispersal at 2900m. Pollen exchange among remnants is driven by population size rather than geographic distance, with larger remnants acting predominantly as pollen donors, and smaller remnants as pollen recipients. Enhanced wind dispersal of pollen in a barren landscape ensures that the seed produced within the catchment includes genetic material from a wide geographic area. However, gene flow estimates based on analysis of non-dispersed seeds were shown to underestimate realised gene immigration into the remnants by a factor of two suggesting that predictive landscape conservation requires integrated estimates of post-recruitment gene flow occurring via both pollen and seed.
Type: Journal Article
URI: http://hdl.handle.net/1893/1469
URL: http://www.nature.com/hdy/journal/v101/n4/abs/hdy200866a.html
DOI Link: http://dx.doi.org/10.1038/hdy.2008.66
Rights: Published in Heredity by Nature Publishing Group / The Genetics Society.; DOI: 10.1038/hdy.2008.66
Affiliation: University of Edinburgh

Files in This Item:

File Description SizeFormat
Bacles and Ennos_2008_Heredity101368_380[1].pdf318.83 kBAdobe PDFView/Open


This item is protected by original copyright

Recommend this item

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.

 

Valid XHTML 1.0! Repository Service Operated by Information Services, University of Stirling
Powered by DSpace Software Copyright © 2002-2010  Duraspace - Feedback