Advanced

The structuring of quantitative genetic variation in a fragmented population of Briza media (Poaceae)

Ellmer, Maarten LU ; Prentice, Honor C LU and Andersson, Stefan LU (2011) In Evolutionary Ecology 25(2). p.509-523
Abstract
The structuring of quantitative genetic variation can have a significant impact on the adaptive potential and long-term viability of species in changing landscapes. The present study of the grass Briza media investigated the relationships between patterns of heritable variation in phenotypic characters and descriptors of landscape structure, land-use history and local habitat conditions in a landscape known to have undergone a progressive and massive loss of semi-natural grassland habitat over the past 300 years. Our analyses revealed significant levels of heritable variation for characters related to overall plant size and spikelet size-number ratio, with estimates of broad-sense heritability ranging between 29 and 34%. Differences... (More)
The structuring of quantitative genetic variation can have a significant impact on the adaptive potential and long-term viability of species in changing landscapes. The present study of the grass Briza media investigated the relationships between patterns of heritable variation in phenotypic characters and descriptors of landscape structure, land-use history and local habitat conditions in a landscape known to have undergone a progressive and massive loss of semi-natural grassland habitat over the past 300 years. Our analyses revealed significant levels of heritable variation for characters related to overall plant size and spikelet size-number ratio, with estimates of broad-sense heritability ranging between 29 and 34%. Differences between demes accounted for a minor fraction of the total variation. In contrast to previous allozyme results from the same plant material, which suggest significant impacts of both neutral and selective processes, neither the deme-specific means nor the heritabilities for the phenotypic characters were consistently associated with landscape structure or land-use history. The results of the study indicate that the structuring of quantitative variation has been relatively insensitive to habitat fragmentation, at least over the time frame considered in this study system. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Genetic drift, Habitat fragmentation, Landscape structure, Local, adaptation
in
Evolutionary Ecology
volume
25
issue
2
pages
509 - 523
publisher
Springer
external identifiers
  • wos:000287583700020
  • scopus:79951955750
ISSN
1573-8477
DOI
10.1007/s10682-010-9417-y
project
BECC
language
English
LU publication?
yes
id
b5b3c7db-1907-4fd5-b602-fc7caf2e0d5a (old id 1872974)
date added to LUP
2011-04-18 10:55:51
date last changed
2017-07-09 03:56:48
@article{b5b3c7db-1907-4fd5-b602-fc7caf2e0d5a,
  abstract     = {The structuring of quantitative genetic variation can have a significant impact on the adaptive potential and long-term viability of species in changing landscapes. The present study of the grass Briza media investigated the relationships between patterns of heritable variation in phenotypic characters and descriptors of landscape structure, land-use history and local habitat conditions in a landscape known to have undergone a progressive and massive loss of semi-natural grassland habitat over the past 300 years. Our analyses revealed significant levels of heritable variation for characters related to overall plant size and spikelet size-number ratio, with estimates of broad-sense heritability ranging between 29 and 34%. Differences between demes accounted for a minor fraction of the total variation. In contrast to previous allozyme results from the same plant material, which suggest significant impacts of both neutral and selective processes, neither the deme-specific means nor the heritabilities for the phenotypic characters were consistently associated with landscape structure or land-use history. The results of the study indicate that the structuring of quantitative variation has been relatively insensitive to habitat fragmentation, at least over the time frame considered in this study system.},
  author       = {Ellmer, Maarten and Prentice, Honor C and Andersson, Stefan},
  issn         = {1573-8477},
  keyword      = {Genetic drift,Habitat fragmentation,Landscape structure,Local,adaptation},
  language     = {eng},
  number       = {2},
  pages        = {509--523},
  publisher    = {Springer},
  series       = {Evolutionary Ecology},
  title        = {The structuring of quantitative genetic variation in a fragmented population of Briza media (Poaceae)},
  url          = {http://dx.doi.org/10.1007/s10682-010-9417-y},
  volume       = {25},
  year         = {2011},
}