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The Journal of Heredity 2002:93(2)
© 2002 The American Genetic Association 93:81-85

Population Genetics of a Polyploid: Is There Hybridization Between Lineages of Hyla versicolor?

N. R. Espinoza, and M. A. F. Noor

From the Department of Biological Sciences, Life Sciences Bldg. 206, Louisiana State University, Baton Rouge, Louisiana 70803. N. R. Espinoza is currently at the Department of Medicine/Division of Oncology, Stanford University Medical Center, Stanford, CA 94305.

Address correspondence to Mohamed Noor at the address above or e-mail: mnoor{at}lsu.edu.

Several studies have demonstrated that polyploid species can form recurrently from their progenitors, but few studies have evaluated gene flow between the resultant polyploid lineages. Here we examine the possibility of hybridization between lineages of the tetraploid common gray treefrog (Hyla versicolor). We utilize a polymerase chain reaction (PCR) cloning approach to estimate the genotypes of tetraploid individuals and measure genetic differentiation between (1) sympatric populations of two lineages and (2) allopatric populations of a single lineage. We find that allele frequencies in sympatric populations of two lineages do not differ, suggesting that frogs of these two lineages hybridize in areas where they co-occur.


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