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Genetic Diversity in Natural Populations of a Soil Bacterium across a Landscape Gradient

J. Vaun McArthur, David A. Kovacic and Michael H. Smith
Proceedings of the National Academy of Sciences of the United States of America
Vol. 85, No. 24 (Dec. 15, 1988), pp. 9621-9624
Stable URL: http://www.jstor.org/stable/32688
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Genetic Diversity in Natural Populations of a Soil Bacterium across a Landscape Gradient
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Abstract

Genetic diversity in natural populations of the bacterium Pseudomonas cepacia was surveyed in 10 enzymes from 70 clones isolated along a landscape gradient. Estimates of genetic diversity, ranging from 0.54 to 0.70, were higher than any previously reported values of which we are aware and were positively correlated with habitat variability. Patterns of bacterial genetic diversity were correlated with habitat variability. Findings indicate that the source of strains used in genetic engineering will greatly affect the outcome of planned releases in variable environments. Selection of generalist strains may confer a large advantage to engineered populations, while selection of laboratory strains may result in quick elimination of the engineered strains.

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