Reconciling strong stabilizing selection with the maintenance of genetic variation in a natural population of black field crickets (Teleogryllus commodus)

Hunt, J., Blows, M. W., Zajitschek, F., Jennionos, M. D. and Brooks, R. (2007) Reconciling strong stabilizing selection with the maintenance of genetic variation in a natural population of black field crickets (Teleogryllus commodus). Genetics, 177 2: 875-880. doi:10.1534/genetics.107.077057


Author Hunt, J.
Blows, M. W.
Zajitschek, F.
Jennionos, M. D.
Brooks, R.
Title Reconciling strong stabilizing selection with the maintenance of genetic variation in a natural population of black field crickets (Teleogryllus commodus)
Formatted title
Reconciling strong stabilizing selection with the maintenance of genetic variation in a natural population of black field crickets (Teleogryllus commodus)
Journal name Genetics   Check publisher's open access policy
ISSN 0016-6731
Publication date 2007-01-01
Sub-type Article (original research)
DOI 10.1534/genetics.107.077057
Volume 177
Issue 2
Start page 875
End page 880
Total pages 6
Editor Jones, E.
Place of publication Baltimore, USA
Publisher Genetics Society of America
Language eng
Subject C1
270207 Quantitative Genetics
270799 Ecology and Evolution not elsewhere classified
780105 Biological sciences
Abstract Genetic variation in single traits, including those closely related to fitness, is pervasive and generally high. By contrast, theory predicts that several forms of selection, including stabilizing selection, will eliminate genetic variation. Stabilizing selection in natural populations tends to be stronger than that assumed in theoretical models of the maintenance of genetic variation. The widespread presence of genetic variation in the presence of strong stabilizing selection is a persistent problem in evolutionary genetics that currently has no compelling explanation. The recent insight that stabilizing selection often acts most strongly on trait combinations via correlational selection may reconcile this problem. Here we show that for a set of male call properties in the cricket Teleogryllus commodus, the pattern of multivariate stabilizing sexual selection is closely associated with the degree of additive genetic variance. The multivariate trait combinations experiencing the strongest stabilizing selection harbored very little genetic variation while combinations tinder weak selection contained most of the genetic variation. Our experiment provides empirical Support for the prediction that a small number of trait combinations experiencing strong stabilizing selection will have reduced genetic variance and that genetically independent trait combinations experiencing weak selection can simultaneously harbor much higher levels of genetic variance.
Keyword Genetics & Heredity
Quantitative Variation
Directional Selection
Sexual Selection
Evolution
Pleiotropy
Covariance
Characters
Models
Dimensionality
Heritability
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Tue, 19 Feb 2008, 01:33:49 EST