engleski

Historical and contemporary genotypic changes associated with the invasion of Croatia by the WCR

In 2008, genetic capabilities within the D. v. virgifera research group at the University of Zagreb were established and preliminary microsatellite genotyping at 6 loci for 6 WCR populations sampled across Croatia showed non significant low levels of genetic differentiation indicative of high levels of individual movement with no barriers to dispersal at distances between 0.5-134km (unpublished data). This preliminary investigation has since expanded to include a temporal study of genetic structure over a 14 year period (historic versus contemporary genotypes, 1996-2009) from D. v. virgifera populations in Croatia and neighbouring countries (Serbia, Hungary, Italy). To understand how genetic structure has changed over time we have genotyped individuals from 43 populations from Croatia, Serbia, Hungary and Italy and the USA (suspected source population). Future work will focus on phenetic/metric variation (geometric morphometrics), described by the geometry of wing vein intersections of individuals, to further estimate population structure and dispersal. During this talk we will discuss how the genetic variation found has enabled continued invasion success in southern Europe where D. v. virgifera was first detected and spread from into Europe.

genotypic changes; invasion; western corn rootworm

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