Quantitative Genetic Effects of Bottlenecks: Experimental Evidence from a Wild Plant Species, Nigella degenii.
(2010) In Journal of Heredity 101. p.298-307- Abstract
- Understanding the genetic consequences of changes in population size is fundamental in a variety of contexts, such as adaptation and conservation biology. In the study presented here, we have performed a replicated experiment with the plant Nigella degenii to explore the quantitative genetic effects of a single-founder bottleneck. In agreement with additive theory, the bottleneck reduced the mean (co)variance within lines and caused stochastic, line-specific changes in the genetic (co)variance structure. However, a significant portion of the (co)variance structure was conserved, and 2 characters-leaf and flower (sepal) size-turned out to be positively correlated in all data sets, indicating a potential for correlated evolution in these... (More)
- Understanding the genetic consequences of changes in population size is fundamental in a variety of contexts, such as adaptation and conservation biology. In the study presented here, we have performed a replicated experiment with the plant Nigella degenii to explore the quantitative genetic effects of a single-founder bottleneck. In agreement with additive theory, the bottleneck reduced the mean (co)variance within lines and caused stochastic, line-specific changes in the genetic (co)variance structure. However, a significant portion of the (co)variance structure was conserved, and 2 characters-leaf and flower (sepal) size-turned out to be positively correlated in all data sets, indicating a potential for correlated evolution in these characters, even after a severe bottleneck. The hierarchical partitioning of genetic variance for flower size was in good agreement with predictions from additive theory, whereas the remaining characters showed an excess of within-line variance and a deficiency of among-line variance. The latter discrepancies were most likely a result of selection, given the small proportion of lines (23%) that remained viable until the end of the experiment. Our results suggest that bottlenecked populations of N. degenii generally have a lower adaptive potential than the ancestral population but also highlight the idiosyncratic nature of bottleneck effects. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1524182
- author
- Andersson, Stefan LU ; Ellmer, Maarten LU ; Jörgensen, Tove LU and Palmé, Anna LU
- organization
- publishing date
- 2010
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Heredity
- volume
- 101
- pages
- 298 - 307
- publisher
- Oxford University Press
- external identifiers
-
- wos:000276747000005
- scopus:77951694935
- pmid:19945991
- ISSN
- 0022-1503
- DOI
- 10.1093/jhered/esp108
- language
- English
- LU publication?
- yes
- id
- 8e6375ee-a1a3-470d-a435-053fddedf368 (old id 1524182)
- date added to LUP
- 2016-04-01 10:52:02
- date last changed
- 2022-01-26 03:12:11
@article{8e6375ee-a1a3-470d-a435-053fddedf368,
abstract = {{Understanding the genetic consequences of changes in population size is fundamental in a variety of contexts, such as adaptation and conservation biology. In the study presented here, we have performed a replicated experiment with the plant Nigella degenii to explore the quantitative genetic effects of a single-founder bottleneck. In agreement with additive theory, the bottleneck reduced the mean (co)variance within lines and caused stochastic, line-specific changes in the genetic (co)variance structure. However, a significant portion of the (co)variance structure was conserved, and 2 characters-leaf and flower (sepal) size-turned out to be positively correlated in all data sets, indicating a potential for correlated evolution in these characters, even after a severe bottleneck. The hierarchical partitioning of genetic variance for flower size was in good agreement with predictions from additive theory, whereas the remaining characters showed an excess of within-line variance and a deficiency of among-line variance. The latter discrepancies were most likely a result of selection, given the small proportion of lines (23%) that remained viable until the end of the experiment. Our results suggest that bottlenecked populations of N. degenii generally have a lower adaptive potential than the ancestral population but also highlight the idiosyncratic nature of bottleneck effects.}},
author = {{Andersson, Stefan and Ellmer, Maarten and Jörgensen, Tove and Palmé, Anna}},
issn = {{0022-1503}},
language = {{eng}},
pages = {{298--307}},
publisher = {{Oxford University Press}},
series = {{Journal of Heredity}},
title = {{Quantitative Genetic Effects of Bottlenecks: Experimental Evidence from a Wild Plant Species, Nigella degenii.}},
url = {{http://dx.doi.org/10.1093/jhered/esp108}},
doi = {{10.1093/jhered/esp108}},
volume = {{101}},
year = {{2010}},
}