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The spread of apomixis and its effect on resident genetic variation

Adolfsson, S and Bengtsson, Bengt Olle LU (2007) In Journal of Evolutionary Biology 20(5). p.1933-1940
Abstract
In a simulation model we investigated how much of the initial genetic variation that is retained in a population after a dominant mutation has brought apomixis to fixation in it. A marker allele associated with the apomixis mutation is generally retained after the fixation of apomixis, particularly if the two alleles are closely linked. The spread of asexuality, however, normally leads to almost no loss of genetic variation, neither with respect to cytotypes nor with respect to genotypes. This holds for large populations and apomixis mutants with strong pollen production. In smaller populations, and with apomicts with reduced pollen production, the outcome is more variable, ranging from no genetic variation retained to only weakly reduced... (More)
In a simulation model we investigated how much of the initial genetic variation that is retained in a population after a dominant mutation has brought apomixis to fixation in it. A marker allele associated with the apomixis mutation is generally retained after the fixation of apomixis, particularly if the two alleles are closely linked. The spread of asexuality, however, normally leads to almost no loss of genetic variation, neither with respect to cytotypes nor with respect to genotypes. This holds for large populations and apomixis mutants with strong pollen production. In smaller populations, and with apomicts with reduced pollen production, the outcome is more variable, ranging from no genetic variation retained to only weakly reduced variability compared with the initial state. These results help explain the high genetic variability in many apomicts. They also imply that natural selection will have many genotypes to act on even after the spread of apomixis. (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
apomixis, genetic variation, cytotypes, asexual reproduction, GMO
in
Journal of Evolutionary Biology
volume
20
issue
5
pages
1933 - 1940
publisher
John Wiley & Sons
external identifiers
  • wos:000249166200029
  • scopus:34547882743
ISSN
1420-9101
DOI
10.1111/j.1420-9101.2007.01371.x
language
English
LU publication?
yes
id
58c80a7d-d498-403d-8e70-b5fef75ad401 (old id 688958)
date added to LUP
2007-12-11 11:16:19
date last changed
2017-01-01 05:16:05
@article{58c80a7d-d498-403d-8e70-b5fef75ad401,
  abstract     = {In a simulation model we investigated how much of the initial genetic variation that is retained in a population after a dominant mutation has brought apomixis to fixation in it. A marker allele associated with the apomixis mutation is generally retained after the fixation of apomixis, particularly if the two alleles are closely linked. The spread of asexuality, however, normally leads to almost no loss of genetic variation, neither with respect to cytotypes nor with respect to genotypes. This holds for large populations and apomixis mutants with strong pollen production. In smaller populations, and with apomicts with reduced pollen production, the outcome is more variable, ranging from no genetic variation retained to only weakly reduced variability compared with the initial state. These results help explain the high genetic variability in many apomicts. They also imply that natural selection will have many genotypes to act on even after the spread of apomixis.},
  author       = {Adolfsson, S and Bengtsson, Bengt Olle},
  issn         = {1420-9101},
  keyword      = {apomixis,genetic variation,cytotypes,asexual reproduction,GMO},
  language     = {eng},
  number       = {5},
  pages        = {1933--1940},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {The spread of apomixis and its effect on resident genetic variation},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2007.01371.x},
  volume       = {20},
  year         = {2007},
}