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Paternal effects on seed germination: a barrier to the genetic assimilation of an endemic plant taxon?

Andersson, Stefan LU ; Månsby, Eva LU and Prentice, Honor C LU (2008) In Journal of Evolutionary Biology 21(5). p.1408-1417
Abstract
We used a crossing experiment to investigate post-zygotic barriers that might limit introgression between a pair of closely-related, gynodioecious plant species - the widespread weed Silene vulgaris and the local Swedish endemic S. uniflora ssp. petraea. The study not only considered the effects of hybridization on conventionally-used (primary) fitness components such as seed set and progeny survival, but also provided a test for the effects of interspecific hybridization on characters with more subtle or habitat-specific effects on fitness. We detected highly significant paternal effects on seed germination properties, with the germination characteristics of hybrid seed resembling those of the species that served as the pollen donor.... (More)
We used a crossing experiment to investigate post-zygotic barriers that might limit introgression between a pair of closely-related, gynodioecious plant species - the widespread weed Silene vulgaris and the local Swedish endemic S. uniflora ssp. petraea. The study not only considered the effects of hybridization on conventionally-used (primary) fitness components such as seed set and progeny survival, but also provided a test for the effects of interspecific hybridization on characters with more subtle or habitat-specific effects on fitness. We detected highly significant paternal effects on seed germination properties, with the germination characteristics of hybrid seed resembling those of the species that served as the pollen donor. These paternal effects on germination represent a potentially strong barrier to interspecific introgression in the two species' natural habitats, where an inappropriate germination response in the habitat of the maternal parent may lead to the failure of seedling establishment. Interspecific crosses had weak or variable effects on progeny survival, flowering and sex ratio, but these effects could not be interpreted in terms of barriers to introgression. Our results indicate that nuclear restorers in S. vulgaris have the capacity to suppress cytoplasmic male-sterility genes in its endemic congener. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cytonuclear interaction, germination, gynodioecy, hybridization, introgression, local adaptation, paternal effect, post-zygotic barrier, sex ratio bias, Silene
in
Journal of Evolutionary Biology
volume
21
issue
5
pages
1408 - 1417
publisher
John Wiley & Sons
external identifiers
  • wos:000258379600023
  • scopus:49549116388
ISSN
1420-9101
DOI
10.1111/j.1420-9101.2008.01554.x
language
English
LU publication?
yes
id
e39e465e-c371-48c1-b576-4ce1586bd43e (old id 1168929)
date added to LUP
2009-01-14 10:45:48
date last changed
2017-01-01 04:19:32
@article{e39e465e-c371-48c1-b576-4ce1586bd43e,
  abstract     = {We used a crossing experiment to investigate post-zygotic barriers that might limit introgression between a pair of closely-related, gynodioecious plant species - the widespread weed Silene vulgaris and the local Swedish endemic S. uniflora ssp. petraea. The study not only considered the effects of hybridization on conventionally-used (primary) fitness components such as seed set and progeny survival, but also provided a test for the effects of interspecific hybridization on characters with more subtle or habitat-specific effects on fitness. We detected highly significant paternal effects on seed germination properties, with the germination characteristics of hybrid seed resembling those of the species that served as the pollen donor. These paternal effects on germination represent a potentially strong barrier to interspecific introgression in the two species' natural habitats, where an inappropriate germination response in the habitat of the maternal parent may lead to the failure of seedling establishment. Interspecific crosses had weak or variable effects on progeny survival, flowering and sex ratio, but these effects could not be interpreted in terms of barriers to introgression. Our results indicate that nuclear restorers in S. vulgaris have the capacity to suppress cytoplasmic male-sterility genes in its endemic congener.},
  author       = {Andersson, Stefan and Månsby, Eva and Prentice, Honor C},
  issn         = {1420-9101},
  keyword      = {cytonuclear interaction,germination,gynodioecy,hybridization,introgression,local adaptation,paternal effect,post-zygotic barrier,sex ratio bias,Silene},
  language     = {eng},
  number       = {5},
  pages        = {1408--1417},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {Paternal effects on seed germination: a barrier to the genetic assimilation of an endemic plant taxon?},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2008.01554.x},
  volume       = {21},
  year         = {2008},
}