Pollen competition reduces inbreeding depression in Collinsia heterophylla (Plantaginaceae)
(2007) In Journal of evolutionary biology 20(2). p.737-749- Abstract
- We tested two predictions of the hypothesis that competition between self-pollen may mitigate negative genetic effects of inbreeding in plants: (1) intense competition among self-pollen increases offspring fitness; and (2) pollen competition reduces the measured strength of inbreeding depression. We used Collinsia heterophylla (Plantaginaceae), an annual with a mixed mating system, to perform controlled crosses in which we varied both the size of the pollen load and the source of pollen (self vs. outcross). Fitness of selfed offspring was higher in the high pollen-load treatment. Our second prediction was also upheld: inbreeding depression was, on average, lower when large pollen loads were applied (11%) relative to the low pollen-load... (More)
- We tested two predictions of the hypothesis that competition between self-pollen may mitigate negative genetic effects of inbreeding in plants: (1) intense competition among self-pollen increases offspring fitness; and (2) pollen competition reduces the measured strength of inbreeding depression. We used Collinsia heterophylla (Plantaginaceae), an annual with a mixed mating system, to perform controlled crosses in which we varied both the size of the pollen load and the source of pollen (self vs. outcross). Fitness of selfed offspring was higher in the high pollen-load treatment. Our second prediction was also upheld: inbreeding depression was, on average, lower when large pollen loads were applied (11%) relative to the low pollen-load treatment (28%). The reduction was significant for two fitness components relatively late in the life-cycle: number of surviving seedlings and pollen-tube growth rate in vitro. These findings suggest that intermittent inbreeding, which leads to self-fertilization in plants with genetic loads, may select for traits that enhance pollen competition. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/167037
- author
- Lankinen, Åsa LU and Armbruster, W S
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- self-pollination, pollen-load size, mixed-mating system, prezygotic selection, mating-system evolution
- in
- Journal of evolutionary biology
- volume
- 20
- issue
- 2
- pages
- 737 - 749
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000244244300032
- scopus:33847029664
- ISSN
- 1420-9101
- DOI
- 10.1111/j.1420-9101.2006.01233.x
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Plant Ecology and Systematics (Closed 2011) (011004000)
- id
- e7d58940-c29d-4e9a-8ad5-78f931dc4ca1 (old id 167037)
- date added to LUP
- 2016-04-01 11:50:56
- date last changed
- 2022-01-26 19:09:05
@article{e7d58940-c29d-4e9a-8ad5-78f931dc4ca1,
abstract = {{We tested two predictions of the hypothesis that competition between self-pollen may mitigate negative genetic effects of inbreeding in plants: (1) intense competition among self-pollen increases offspring fitness; and (2) pollen competition reduces the measured strength of inbreeding depression. We used Collinsia heterophylla (Plantaginaceae), an annual with a mixed mating system, to perform controlled crosses in which we varied both the size of the pollen load and the source of pollen (self vs. outcross). Fitness of selfed offspring was higher in the high pollen-load treatment. Our second prediction was also upheld: inbreeding depression was, on average, lower when large pollen loads were applied (11%) relative to the low pollen-load treatment (28%). The reduction was significant for two fitness components relatively late in the life-cycle: number of surviving seedlings and pollen-tube growth rate in vitro. These findings suggest that intermittent inbreeding, which leads to self-fertilization in plants with genetic loads, may select for traits that enhance pollen competition.}},
author = {{Lankinen, Åsa and Armbruster, W S}},
issn = {{1420-9101}},
keywords = {{self-pollination; pollen-load size; mixed-mating system; prezygotic selection; mating-system evolution}},
language = {{eng}},
number = {{2}},
pages = {{737--749}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Journal of evolutionary biology}},
title = {{Pollen competition reduces inbreeding depression in Collinsia heterophylla (Plantaginaceae)}},
url = {{http://dx.doi.org/10.1111/j.1420-9101.2006.01233.x}},
doi = {{10.1111/j.1420-9101.2006.01233.x}},
volume = {{20}},
year = {{2007}},
}