| Pollen competition reduces inbreeding depression in Collinsia heterophylla (Plantaginaceae). | |
| | |
MedLine Citation:
|
PMID: 17305839 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
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. |
| | |
Authors:
|
A Lankinen; W S Armbruster |
Related Documents
:
|
1705719 - Asa-induced release of histamine from nasal mucous membranes in analgesic intolerance a... 1710069 - Acoustic rhinometry: values from adults with subjective normal nasal patency. 18180939 - Can the electronic nose diagnose chronic rhinosinusitis? a new experimental study. 21701289 - Myoelectric activation and kinetics of different plyometric push-up exercises. 1554209 - Nasal cannula and transtracheal oxygen delivery. a comparison of patient response after... 22525349 - Effects of exercise training and rhoa/rock inhibition on plaque in apoe(-/-) mice. 4003569 - Energy sources in fully aerobic rest-work transitions: a new role for glycolysis. 11406489 - Sarcoplasmic reticulum ca(2+) uptake is impaired in coronary smooth muscle distal to co... 2035699 - Hyperoxia lowers sympathetic activity at rest but not during exercise in humans. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Journal of evolutionary biology Volume: 20 ISSN: 1010-061X ISO Abbreviation: J. Evol. Biol. Publication Date: 2007 Mar |
Date Detail:
|
Created Date: 2007-02-19 Completed Date: 2007-04-24 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8809954 Medline TA: J Evol Biol Country: Switzerland |
Other Details:
|
Languages: eng Pagination: 737-49 Citation Subset: IM |
Affiliation:
|
Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway. asa.lankinen@ekol.lu.se |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Crosses, Genetic Inbreeding* Multivariate Analysis Plantago / genetics, physiology* Pollen / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The origins of ecotypic variation of rainbow trout: a test of environmental vs. genetically based di...
Next Document: Senescence in relation to latitude and migration in birds.