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Geographic Origins and Genetic Diversity of Air-Potato (Dioscorea bulbifera) in Florida

Published online by Cambridge University Press:  20 January 2017

Matthew D. Croxton ,
Michael A. Andreu ,
Dean A. Williams ,
William A. Overholt  and
Jason A. Smith
Matthew D. Croxton*
Affiliation:
Gulf Coast Research and Education Center, University of Florida, 1200 North Park Road, Plant City, FL 33563
Michael A. Andreu
Affiliation:
Texas Christian University, 2800 South University Drive, Fort Worth, TX 76129
Dean A. Williams
Affiliation:
Indian River Research and Education Center, University of Florida, 2199 South Rock Road, Fort Pierce, FL 34945
William A. Overholt
Affiliation:
School of Forest Resources and Conservation, University of Florida, 118 Newins-Ziegler Hall, Gainesville, FL 32611
Jason A. Smith
Affiliation:
Gulf Coast Research and Education Center, University of Florida, 1200 North Park Road, Plant City, FL 33563
*
Corresponding author's E-mail: [email protected]
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Abstract

In Florida, air-potato is an invasive weed with high management priority, which may soon be targeted using classical biological control. This yam was introduced during the early 20th century by the United States Department of Agriculture (USDA) from areas throughout its extensive range. Our objectives were to characterize the genetic diversity of the invasive population in Florida and to identify the source regions of introduction. Authorities have often asserted the African provenance of the species in Florida, but our analyses, conducted using chloroplast markers, indicate that Florida air-potato is more similar to specimens examined from China than to those from Africa. Low intraspecific genetic diversity in Florida indicates that the invasive population was the result of at least two introductions becoming established in Florida.

Keywords

Air-potato, Dioscorea bulbifera L.Pantropical distributionbiological controlinvasive yamchloroplast DNA
Type
Research
Information
Invasive Plant Science and Management , Volume 4 , Issue 1 , March 2011 , pp. 22 - 30
Copyright
Copyright © Weed Science Society of America 

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