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Strong Inbreeding Depression in Two Scandinavian Populations of the Self-Incompatible Perennial Herb Arabidopsis Lyrata

Sletvold, Nina; Mousset, Mathilde; Hagenblad, Jenny; Hansson, Bengt LU and Agren, Jon (2013) In Evolution 67(10). p.2876-2888
Abstract
Inbreeding depression is a key factor influencing mating system evolution in plants, but current understanding of its relationship with selfing rate is limited by a sampling bias with few estimates for self-incompatible species. We quantified inbreeding depression () over two growing seasons in two populations of the self-incompatible perennial herb Arabidopsis lyrata ssp. petraea in Scandinavia. Inbreeding depression was strong and of similar magnitude in both populations. Inbreeding depression for overall fitness across two seasons (the product of number of seeds, offspring viability, and offspring biomass) was 81% and 78% in the two populations. Chlorophyll deficiency accounted for 81% of seedling mortality in the selfing treatment, and... (More)
Inbreeding depression is a key factor influencing mating system evolution in plants, but current understanding of its relationship with selfing rate is limited by a sampling bias with few estimates for self-incompatible species. We quantified inbreeding depression () over two growing seasons in two populations of the self-incompatible perennial herb Arabidopsis lyrata ssp. petraea in Scandinavia. Inbreeding depression was strong and of similar magnitude in both populations. Inbreeding depression for overall fitness across two seasons (the product of number of seeds, offspring viability, and offspring biomass) was 81% and 78% in the two populations. Chlorophyll deficiency accounted for 81% of seedling mortality in the selfing treatment, and was not observed among offspring resulting from outcrossing. The strong reduction in both early viability and late quantitative traits suggests that inbreeding depression is due to deleterious alleles of both large and small effect, and that both populations experience strong selection against the loss of self-incompatibility. A review of available estimates suggested that inbreeding depression tends to be stronger in self-incompatible than in self-compatible highly outcrossing species, implying that undersampling of self-incompatible taxa may bias estimates of the relationship between mating system and inbreeding depression. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Arabidopsis, inbreeding depression, mating-system evolution, perennial, life-history, self-incompatibility
in
Evolution
volume
67
issue
10
pages
2876 - 2888
publisher
Wiley-Blackwell
external identifiers
  • wos:000325255100009
  • scopus:84885072377
ISSN
1558-5646
DOI
10.1111/evo.12174
project
Inbreeding and inbreeding depression
language
English
LU publication?
yes
id
99225047-0d83-464b-a0f8-00f2aa8973e8 (old id 4172012)
date added to LUP
2013-11-25 11:02:30
date last changed
2019-04-07 03:47:11
@article{99225047-0d83-464b-a0f8-00f2aa8973e8,
  abstract     = {Inbreeding depression is a key factor influencing mating system evolution in plants, but current understanding of its relationship with selfing rate is limited by a sampling bias with few estimates for self-incompatible species. We quantified inbreeding depression () over two growing seasons in two populations of the self-incompatible perennial herb Arabidopsis lyrata ssp. petraea in Scandinavia. Inbreeding depression was strong and of similar magnitude in both populations. Inbreeding depression for overall fitness across two seasons (the product of number of seeds, offspring viability, and offspring biomass) was 81% and 78% in the two populations. Chlorophyll deficiency accounted for 81% of seedling mortality in the selfing treatment, and was not observed among offspring resulting from outcrossing. The strong reduction in both early viability and late quantitative traits suggests that inbreeding depression is due to deleterious alleles of both large and small effect, and that both populations experience strong selection against the loss of self-incompatibility. A review of available estimates suggested that inbreeding depression tends to be stronger in self-incompatible than in self-compatible highly outcrossing species, implying that undersampling of self-incompatible taxa may bias estimates of the relationship between mating system and inbreeding depression.},
  author       = {Sletvold, Nina and Mousset, Mathilde and Hagenblad, Jenny and Hansson, Bengt and Agren, Jon},
  issn         = {1558-5646},
  keyword      = {Arabidopsis,inbreeding depression,mating-system evolution,perennial,life-history,self-incompatibility},
  language     = {eng},
  number       = {10},
  pages        = {2876--2888},
  publisher    = {Wiley-Blackwell},
  series       = {Evolution},
  title        = {Strong Inbreeding Depression in Two Scandinavian Populations of the Self-Incompatible Perennial Herb Arabidopsis Lyrata},
  url          = {http://dx.doi.org/10.1111/evo.12174},
  volume       = {67},
  year         = {2013},
}