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Balancing Selection on a Floral Polymorphism
Banu Subramaniam and Mark D. Rausher
Vol. 54, No. 2 (Apr., 2000), pp. 691-695
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2640874
Page Count: 5
You can always find the topics here!Topics: Alleles, Genotypes, Gene frequency, Population estimates, Evolution, Population dynamics, Genetic loci, Viability, Plants, Population growth
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The common morning glory, Ipomoea purpurea, exhibits a flower color polymorphism at the W locus throughout the southeastern North America. The W locus controls whether flowers will be darkly pigmented (WW), lightly pigmented (Ww), or white with pigmented rays (ww). In this report, we describe results of a perturbation, or convergence, experiment using five plots designed to determine whether balancing selection operates on the W locus. The pattern of gene frequency changes obtained are indicative of balancing selection operating at the W locus, providing direct evidence that both the alleles are actively maintained by selection.
Evolution © 2000 Society for the Study of Evolution