|Bagnall, Ruth Ann - UNIV. OF ST. THOMAS|
|Rosell, Rosie - UNIV. OF ST. THOMAS|
|Frohlich, Donald - UNIV. OF ST. THOMAS|
Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only
Publication Acceptance Date: October 6, 2006
Publication Date: December 3, 2006
Citation: Shatters, R.G., Boykin, L.M., Bagnall, R., Rosell, R.C., Frohlich, D.R., Mckenzie, C.L. 2006. Population dynamics of the Bemisia tabaci B and Q biotypes as determined by microsatellite marker and mitochondrial COI sequence comparisons. Plant and Animal Genome Conference. January 13-17, 2007, San Diego, California Technical Abstract: The current understanding of Bemisia tabaci phylogenetics suggests that this organism exists as a cryptic species complex. This complex is composed of what are most commonly called biotypes, at least some of which appear to have pre and/or post zygotic barriers to hybridization. Numerous studies have been performed to determine the geographical distribution of different biotypes, but little is known about the gene flow within and among biotypes. Recent research on microsatellite markers associated with different biotypes in Australia and South East Asia indicates limited gene flow among populations. Using the same microsatellite marker techniques, we have looked at the gene flow among and within B and Q biotype populations in the Mediterranean region and in the U. S. Our data indicate that despite the more recent invasion of the Q biotype into the U.S., it has much greater genetic diversity than the B biotype. This data corroborates the mitochondrial COI sequence comparisons performed from populations throughout the U.S. Furthermore, Structure (tm) analysis of the Q biotype microsatellite data indicates that movement of the Q biotype into the U.S. is the result of more than a single introduction. There is also no observation of gene flow between the B and Q biotypes in analysis of both the COI and microsatellite data, supporting the species complex concept for this agricultural pest.