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Genetic Management of Fragmented Animal and Plant Populations$
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Richard Frankham, Jonathan D. Ballou, Katherine Ralls, Mark Eldridge, Michele R. Dudash, Charles B. Fenster, Robert C. Lacy, and Paul Sunnucks

Print publication date: 2017

Print ISBN-13: 9780198783398

Published to Oxford Scholarship Online: September 2017

DOI: 10.1093/oso/9780198783398.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use.date: 26 June 2022

Determining the number and location of genetically differentiated population fragments

Determining the number and location of genetically differentiated population fragments

Chapter:
(p.203) Chapter 10 Determining the number and location of genetically differentiated population fragments
Source:
Genetic Management of Fragmented Animal and Plant Populations
Author(s):

Richard Frankham

Jonathan D. Ballou

Katherine Ralls

Mark D. B. Eldridge

Michele R. Dudash

Charles B. Fenster

Robert C. Lacy

Paul Sunnucks

Publisher:
Oxford University Press
DOI:10.1093/oso/9780198783398.003.0010

The number and geographic location of genetically differentiated populations must be identified to determine if fragmented populations require genetic management. Clustering of related genotypes to geographic locations (landscape genetic analyses) is used to determine the number of populations and their boundaries, with the simplest analyses relying on random mating within, but not across populations. Evidence of genetic differentiation among populations indicates either that they have drifted apart (and are likely inbred) and/or that the populations are adaptively differentiated. The current response when populations are genetically differentiated is usually to recommend separate management, but this is often ill-advised. A paradigm shift is needed where evidence of genetic differentiation among populations is followed by an assessment of whether populations are suffering genetic erosion, whether there are other populations to which they could be crossed, and whether the crosses would be beneficial, or harmful.

Keywords:   Adaptively differentiated, crossed, fragmented populations, genetic differentiation, genetic erosion, landscape genetic analyses, populations

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