The effects of cytoplasmic male sterility on cytonuclear disequilibria in hybrid zones |
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| Authors: | M L Cellino J Arnold |
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| Institution: | (1) Botany Department, University of Georgia, 30602 Athens, GA, USA;(2) Genetics Department, University of Georgia, 30602 Athens, GA, USA |
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| Abstract: | Male sterility is studied in hybrid zones by different measures of cytonuclear disequilibria, D, D1, D2, and D3. Of particular interest are the dynamics of disequilibria as the system evolves to equilibrium. Our first model, the hybrid
swarm model, yields equilibrium results identical to those observed in a model with random mating. In our second model of
a hybrid zone, predictions of the sign pattern of disequilibrium values can be made based on migration values. A characteristic
sign pattern may help to distinguish cytoplasmic male sterility (CMS) from other mechanisms of selection. Our simple CMS model
with migration is successfully fit to cytonuclear data on a hybrid population of cottonwoods. |
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| Keywords: | cytoplasmic male sterility cytonuclear disequilibria hybrid zone |
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