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Journal of Virology, September 2006, p. 8345-8350, Vol. 80, No. 17
0022-538X/06/$08.00+0 doi:10.1128/JVI.00568-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.
Analysis of Genetic Bottlenecks during Horizontal Transmission of Cucumber Mosaic Virus
Akhtar Ali,1
Hongye Li,1,
William L. Schneider,2
Diana J. Sherman,2
Stewart Gray,3
Dawn Smith,3 and
Marilyn J. Roossinck1*
Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, Oklahoma 73401,1
USDA-ARS Foreign Disease Weed Science Research Unit, Fort Detrick, Maryland 21702,2
USDA-ARS and Department of Plant Pathology, Cornell University, Ithaca, New York 148533
Received 17 March 2006/
Accepted 15 June 2006
Genetic bottlenecks may occur in virus populations when only a few individuals are transferred horizontally from one host to another, or when a viral population moves systemically from the infection site. Genetic bottlenecks during the systemic movement of an RNA plant virus population were reported previously (H. Li and M. J. Roossinck, J. Virol. 78:10582-10587, 2004). In this study we mechanically inoculated an artificial population consisting of 12 restriction enzyme marker mutants of Cucumber mosaic virus (CMV) onto young leaves of squash plants and used two aphid species, Aphis gossypii and Myzus persicae, to transmit the virus populations from infected source plants to healthy squash plants. Horizontal transmission by aphids constituted a significant bottleneck, as the population in the aphid-inoculated plants contained far fewer mutants than the original inoculum source. Additional experiments demonstrated that genetic variation in the artificial population of CMV is not reduced during the acquisition of the virus but is significantly reduced during the inoculation period.
* Corresponding author. Mailing address: Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, OK 73401. Phone: (580) 224-6600. Fax: (580) 224-6692. E-mail:
mroossinck{at}noble.org.
Present address: Institute of Biotechnology, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang, 310029, People's Republic of China.
Journal of Virology, September 2006, p. 8345-8350, Vol. 80, No. 17
0022-538X/06/$08.00+0 doi:10.1128/JVI.00568-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.
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